dnl dnl Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana dnl University Research and Technology dnl Corporation. All rights reserved. dnl Copyright (c) 2004-2015 The University of Tennessee and The University dnl of Tennessee Research Foundation. All rights dnl reserved. dnl Copyright (c) 2004-2006 High Performance Computing Center Stuttgart, dnl University of Stuttgart. All rights reserved. dnl Copyright (c) 2004-2005 The Regents of the University of California. dnl All rights reserved. dnl Copyright (c) 2008-2015 Cisco Systems, Inc. All rights reserved. dnl Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved. dnl Copyright (c) 2015 Research Organization for Information Science dnl and Technology (RIST). All rights reserved. dnl Copyright (c) 2014-2016 Los Alamos National Security, LLC. All rights dnl reserved. dnl $COPYRIGHT$ dnl dnl Additional copyrights may follow dnl dnl $HEADER$ dnl AC_DEFUN([OPAL_CHECK_SYNC_BUILTIN_CSWAP_INT128], [ OPAL_VAR_SCOPE_PUSH([sync_bool_compare_and_swap_128_result CFLAGS_save]) AC_ARG_ENABLE([cross-cmpset128],[AC_HELP_STRING([--enable-cross-cmpset128], [enable the use of the __sync builtin atomic compare-and-swap 128 when cross compiling])]) sync_bool_compare_and_swap_128_result=0 if test ! "$enable_cross_cmpset128" = "yes" ; then AC_MSG_CHECKING([for processor support of __sync builtin atomic compare-and-swap on 128-bit values]) AC_RUN_IFELSE([AC_LANG_PROGRAM([], [__int128 x = 0; __sync_bool_compare_and_swap (&x, 0, 1);])], [AC_MSG_RESULT([yes]) sync_bool_compare_and_swap_128_result=1], [AC_MSG_RESULT([no])], [AC_MSG_RESULT([no (cross compiling)])]) if test $sync_bool_compare_and_swap_128_result = 0 ; then CFLAGS_save=$CFLAGS CFLAGS="$CFLAGS -mcx16" AC_MSG_CHECKING([for __sync builtin atomic compare-and-swap on 128-bit values with -mcx16 flag]) AC_RUN_IFELSE([AC_LANG_PROGRAM([], [__int128 x = 0; __sync_bool_compare_and_swap (&x, 0, 1);])], [AC_MSG_RESULT([yes]) sync_bool_compare_and_swap_128_result=1 CFLAGS_save="$CFLAGS"], [AC_MSG_RESULT([no])], [AC_MSG_RESULT([no (cross compiling)])]) CFLAGS=$CFLAGS_save fi else AC_MSG_CHECKING([for compiler support of __sync builtin atomic compare-and-swap on 128-bit values]) # Check if the compiler supports the __sync builtin AC_TRY_LINK([], [__int128 x = 0; __sync_bool_compare_and_swap (&x, 0, 1);], [AC_MSG_RESULT([yes]) sync_bool_compare_and_swap_128_result=1], [AC_MSG_RESULT([no])]) if test $sync_bool_compare_and_swap_128_result = 0 ; then CFLAGS_save=$CFLAGS CFLAGS="$CFLAGS -mcx16" AC_MSG_CHECKING([for __sync builtin atomic compare-and-swap on 128-bit values with -mcx16 flag]) AC_TRY_LINK([], [__int128 x = 0; __sync_bool_compare_and_swap (&x, 0, 1);], [AC_MSG_RESULT([yes]) sync_bool_compare_and_swap_128_result=1 CFLAGS_save="$CFLAGS"], [AC_MSG_RESULT([no])]) CFLAGS=$CFLAGS_save fi fi AC_DEFINE_UNQUOTED([OPAL_HAVE_SYNC_BUILTIN_CSWAP_INT128], [$sync_bool_compare_and_swap_128_result], [Whether the __sync builtin atomic compare and swap supports 128-bit values]) OPAL_VAR_SCOPE_POP ]) AC_DEFUN([OPAL_CHECK_SYNC_BUILTINS], [ AC_MSG_CHECKING([for __sync builtin atomics]) AC_TRY_LINK([long tmp;], [__sync_synchronize(); __sync_bool_compare_and_swap(&tmp, 0, 1); __sync_add_and_fetch(&tmp, 1);], [AC_MSG_RESULT([yes]) $1], [AC_MSG_RESULT([no]) $2]) AC_MSG_CHECKING([for 64-bit __sync builtin atomics]) AC_TRY_LINK([ #include uint64_t tmp;], [ __sync_bool_compare_and_swap(&tmp, 0, 1); __sync_add_and_fetch(&tmp, 1);], [AC_MSG_RESULT([yes]) opal_asm_sync_have_64bit=1], [AC_MSG_RESULT([no]) opal_asm_sync_have_64bit=0]) AC_DEFINE_UNQUOTED([OPAL_ASM_SYNC_HAVE_64BIT],[$opal_asm_sync_have_64bit], [Whether 64-bit is supported by the __sync builtin atomics]) # Check for 128-bit support OPAL_CHECK_SYNC_BUILTIN_CSWAP_INT128 ]) AC_DEFUN([OPAL_CHECK_GCC_BUILTIN_CSWAP_INT128], [ OPAL_VAR_SCOPE_PUSH([atomic_compare_exchange_n_128_result CFLAGS_save]) AC_ARG_ENABLE([cross-cmpset128],[AC_HELP_STRING([--enable-cross-cmpset128], [enable the use of the __sync builtin atomic compare-and-swap 128 when cross compiling])]) atomic_compare_exchange_n_128_result=0 if test ! "$enable_cross_cmpset128" = "yes" ; then AC_MSG_CHECKING([for processor support of __atomic builtin atomic compare-and-swap on 128-bit values]) AC_RUN_IFELSE([AC_LANG_PROGRAM([], [__int128 x = 0, y = 0; __atomic_compare_exchange_n (&x, &y, 1, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED);])], [AC_MSG_RESULT([yes]) atomic_compare_exchange_n_128_result=1], [AC_MSG_RESULT([no])], [AC_MSG_RESULT([no (cross compiling)])]) if test $atomic_compare_exchange_n_128_result = 0 ; then CFLAGS_save=$CFLAGS CFLAGS="$CFLAGS -mcx16" AC_MSG_CHECKING([for __atomic builtin atomic compare-and-swap on 128-bit values with -mcx16 flag]) AC_RUN_IFELSE([AC_LANG_PROGRAM([], [__int128 x = 0, y = 0; __atomic_compare_exchange_n (&x, &y, 1, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED);])], [AC_MSG_RESULT([yes]) atomic_compare_exchange_n_128_result=1 CFLAGS_save="$CFLAGS"], [AC_MSG_RESULT([no])], [AC_MSG_RESULT([no (cross compiling)])]) CFLAGS=$CFLAGS_save fi if test $atomic_compare_exchange_n_128_result = 1 ; then AC_MSG_CHECKING([if __int128 atomic compare-and-swap is always lock-free]) AC_RUN_IFELSE([AC_LANG_PROGRAM([], [if (!__atomic_always_lock_free(16, 0)) { return 1; }])], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) OPAL_CHECK_SYNC_BUILTIN_CSWAP_INT128 atomic_compare_exchange_n_128_result=0], [AC_MSG_RESULT([no (cross compiling)])]) fi else AC_MSG_CHECKING([for compiler support of __atomic builtin atomic compare-and-swap on 128-bit values]) # Check if the compiler supports the __atomic builtin AC_TRY_LINK([], [__int128 x = 0, y = 0; __atomic_compare_exchange_n (&x, &y, 1, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED);], [AC_MSG_RESULT([yes]) atomic_compare_exchange_n_128_result=1], [AC_MSG_RESULT([no])]) if test $atomic_compare_exchange_n_128_result = 0 ; then CFLAGS_save=$CFLAGS CFLAGS="$CFLAGS -mcx16" AC_MSG_CHECKING([for __atomic builtin atomic compare-and-swap on 128-bit values with -mcx16 flag]) AC_TRY_LINK([], [__int128 x = 0, y = 0; __atomic_compare_exchange_n (&x, &y, 1, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED);], [AC_MSG_RESULT([yes]) atomic_compare_exchange_n_128_result=1 CFLAGS_save="$CFLAGS"], [AC_MSG_RESULT([no])]) CFLAGS=$CFLAGS_save fi fi AC_DEFINE_UNQUOTED([OPAL_HAVE_GCC_BUILTIN_CSWAP_INT128], [$atomic_compare_exchange_n_128_result], [Whether the __atomic builtin atomic compare and swap is lock-free on 128-bit values]) OPAL_VAR_SCOPE_POP ]) AC_DEFUN([OPAL_CHECK_GCC_ATOMIC_BUILTINS], [ AC_MSG_CHECKING([for __atomic builtin atomics]) AC_TRY_LINK([long tmp, old = 0;], [__atomic_thread_fence(__ATOMIC_SEQ_CST); __atomic_compare_exchange_n(&tmp, &old, 1, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED); __atomic_add_fetch(&tmp, 1, __ATOMIC_RELAXED);], [AC_MSG_RESULT([yes]) $1], [AC_MSG_RESULT([no]) $2]) # Check for 128-bit support OPAL_CHECK_GCC_BUILTIN_CSWAP_INT128 ]) dnl ################################################################# dnl dnl OPAL_CHECK_ASM_TEXT dnl dnl Determine how to set current mode as text. dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_TEXT],[ AC_MSG_CHECKING([directive for setting text section]) opal_cv_asm_text="" if test "$opal_cv_c_compiler_vendor" = "microsoft" ; then # text section will be brought in with the rest of # header for MS - leave blank for now opal_cv_asm_text="" else case $host in *-aix*) opal_cv_asm_text=[".csect .text[PR]"] ;; *) opal_cv_asm_text=".text" ;; esac fi AC_MSG_RESULT([$opal_cv_asm_text]) AC_DEFINE_UNQUOTED([OPAL_ASM_TEXT], ["$opal_cv_asm_text"], [Assembly directive for setting text section]) OPAL_ASM_TEXT="$opal_cv_asm_text" AC_SUBST(OPAL_ASM_TEXT) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_GLOBAL dnl dnl Sets OPAL_ASM_GLOBAL to the value to prefix global values dnl dnl I'm sure if I don't have a test for this, there will be some dnl dumb platform that uses something else dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_GLOBAL],[ AC_MSG_CHECKING([directive for exporting symbols]) opal_cv_asm_global="" if test "$opal_cv_c_compiler_vendor" = "microsoft" ; then opal_cv_asm_global="PUBLIC" else case $host in *) opal_cv_asm_global=".globl" ;; esac fi AC_MSG_RESULT([$opal_cv_asm_global]) AC_DEFINE_UNQUOTED([OPAL_ASM_GLOBAL], ["$opal_cv_asm_global"], [Assembly directive for exporting symbols]) OPAL_ASM_GLOBAL="$opal_cv_asm_global" AC_SUBST(OPAL_AS_GLOBAL) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_LSYM dnl dnl Sets OPAL_ASM_LSYM to the prefix value on a symbol to make it dnl an internal label (jump target and whatnot) dnl dnl We look for L .L $ L$ (in that order) for something that both dnl assembles and does not leave a label in the output of nm. Fall dnl back to L if nothing else seems to work :/ dnl dnl ################################################################# # _OPAL_CHECK_ASM_LSYM([variable-to-set]) # --------------------------------------- AC_DEFUN([_OPAL_CHECK_ASM_LSYM],[ AC_REQUIRE([AC_PROG_GREP]) $1="L" for sym in L .L $ L$ ; do asm_result=0 echo "configure: trying $sym" >&AC_FD_CC OPAL_TRY_ASSEMBLE([foobar$opal_cv_asm_label_suffix ${sym}mytestlabel$opal_cv_asm_label_suffix], [# ok, we succeeded at assembling. see if we can nm, # throwing the results in a file if $NM conftest.$OBJEXT > conftest.out 2>&AC_FD_CC ; then if test "`$GREP mytestlabel conftest.out`" = "" ; then # there was no symbol... looks promising to me $1="$sym" asm_result=1 elif test ["`$GREP ' [Nt] .*mytestlabel' conftest.out`"] = "" ; then # see if we have a non-global-ish symbol # but we should see if we can do better. $1="$sym" fi else # not so much on the NM goodness :/ echo "$NM failed. Output from NM was:" >&AC_FD_CC cat conftest.out >&AC_FD_CC AC_MSG_WARN([$NM could not read object file]) fi ]) if test "$asm_result" = "1" ; then break fi done rm -f conftest.out unset asm_result sym ]) # OPAL_CHECK_ASM_LSYM() # --------------------- AC_DEFUN([OPAL_CHECK_ASM_LSYM],[ AC_REQUIRE([AC_PROG_NM]) AC_CACHE_CHECK([prefix for lsym labels], [opal_cv_asm_lsym], [_OPAL_CHECK_ASM_LSYM([opal_cv_asm_lsym])]) AC_DEFINE_UNQUOTED([OPAL_ASM_LSYM], ["$opal_cv_asm_lsym"], [Assembly prefix for lsym labels]) OPAL_ASM_LSYM="$opal_cv_asm_lsym" AC_SUBST(OPAL_ASM_LSYM) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_PROC dnl dnl Sets a cv-flag, if the compiler needs a proc/endp-definition to dnl link with C. dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_PROC],[ AC_CACHE_CHECK([if .proc/endp is needed], [opal_cv_asm_need_proc], [opal_cv_asm_need_proc="no" OPAL_TRY_ASSEMBLE([ .proc mysym mysym: .endp mysym], [opal_cv_asm_need_proc="yes"]) rm -f conftest.out]) if test "$opal_cv_asm_need_proc" = "yes" ; then opal_cv_asm_proc=".proc" opal_cv_asm_endproc=".endp" else opal_cv_asm_proc="#" opal_cv_asm_endproc="#" fi ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_GSYM dnl dnl Sets OPAL_ASM_GSYM to the prefix value on a symbol to make it dnl a global linkable from C. Basically, an _ or not. dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_GSYM],[ AC_CACHE_CHECK([prefix for global symbol labels], [opal_cv_asm_gsym], [_OPAL_CHECK_ASM_GSYM]) if test "$opal_cv_asm_gsym" = "none" ; then AC_MSG_ERROR([Could not determine global symbol label prefix]) fi AC_DEFINE_UNQUOTED([OPAL_ASM_GSYM], ["$opal_cv_asm_gsym"], [Assembly prefix for gsym labels]) OPAL_ASM_GSYM="$opal_cv_asm_gsym" AC_SUBST(OPAL_ASM_GSYM) ]) AC_DEFUN([_OPAL_CHECK_ASM_GSYM],[ opal_cv_asm_gsym="none" for sym in "_" "" "." ; do asm_result=0 echo "configure: trying $sym" >&AC_FD_CC cat > conftest_c.c <&AC_FD_CC opal_link="$CC $CFLAGS conftest_c.$OBJEXT conftest.$OBJEXT -o conftest $LDFLAGS $LIBS > conftest.link 2>&1" if AC_TRY_EVAL(opal_link) ; then # save the warnings cat conftest.link >&AC_FD_CC asm_result=1 else cat conftest.link >&AC_FD_CC echo "configure: failed C program was: " >&AC_FD_CC cat conftest_c.c >&AC_FD_CC echo "configure: failed ASM program was: " >&AC_FD_CC cat conftest.s >&AC_FD_CC asm_result=0 fi else # save output and failed program cat conftest.cmpl >&AC_FD_CC echo "configure: failed C program was: " >&AC_FD_CC cat conftest.c >&AC_FD_CC asm_result=0 fi], [asm_result=0]) if test "$asm_result" = "1" ; then opal_cv_asm_gsym="$sym" break fi done rm -rf conftest.* ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_LABEL_SUFFIX dnl dnl Sets OPAL_ASM_LABEL_SUFFIX to the value to suffix for labels dnl dnl I'm sure if I don't have a test for this, there will be some dnl dumb platform that uses something else dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_LABEL_SUFFIX],[ AC_MSG_CHECKING([suffix for labels]) opal_cv_asm_label_suffix="" case $host in *) opal_cv_asm_label_suffix=":" ;; esac AC_MSG_RESULT([$opal_cv_asm_label_suffix]) AC_DEFINE_UNQUOTED([OPAL_ASM_LABEL_SUFFIX], ["$opal_cv_asm_label_suffix"], [Assembly suffix for labels]) OPAL_ASM_LABEL_SUFFIX="$opal_cv_asm_label_suffix" AC_SUBST(OPAL_AS_LABEL_SUFFIX) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_ALIGN_LOG dnl dnl Sets OPAL_ASM_ALIGN_LOG to 1 if align is specified dnl logarithmically, 0 otherwise dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_ALIGN_LOG],[ AC_REQUIRE([AC_PROG_NM]) AC_REQUIRE([AC_PROG_GREP]) AC_CACHE_CHECK([if .align directive takes logarithmic value], [opal_cv_asm_align_log], [ OPAL_TRY_ASSEMBLE([ $opal_cv_asm_text .align 4 $opal_cv_asm_global foo .byte 1 .align 4 foo$opal_cv_asm_label_suffix .byte 2], [opal_asm_addr=[`$NM conftest.$OBJEXT | $GREP foo | sed -e 's/.*\([0-9a-fA-F][0-9a-fA-F]\).*foo.*/\1/'`]], [opal_asm_addr=""]) # test for both 16 and 10 (decimal and hex notations) echo "configure: .align test address offset is $opal_asm_addr" >&AC_FD_CC if test "$opal_asm_addr" = "16" || test "$opal_asm_addr" = "10" ; then opal_cv_asm_align_log="yes" else opal_cv_asm_align_log="no" fi]) if test "$opal_cv_asm_align_log" = "yes" || test "$opal_cv_asm_align_log" = "1" ; then opal_asm_align_log_result=1 else opal_asm_align_log_result=0 fi AC_DEFINE_UNQUOTED([OPAL_ASM_ALIGN_LOG], [$asm_align_log_result], [Assembly align directive expects logarithmic value]) unset omp_asm_addr asm_result ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_TYPE dnl dnl Sets OPAL_ASM_TYPE to the prefix for the function type to dnl set a symbol's type as function (needed on ELF for shared dnl libaries). If no .type directive is needed, sets OPAL_ASM_TYPE dnl to an empty string dnl dnl We look for @ \# % dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_TYPE],[ AC_CACHE_CHECK([prefix for function in .type], [opal_cv_asm_type], [_OPAL_CHECK_ASM_TYPE]) AC_DEFINE_UNQUOTED([OPAL_ASM_TYPE], ["$opal_cv_asm_type"], [How to set function type in .type directive]) OPAL_ASM_TYPE="$opal_cv_asm_type" AC_SUBST(OPAL_ASM_TYPE) ]) AC_DEFUN([_OPAL_CHECK_ASM_TYPE],[ opal_cv_asm_type="" case "${host}" in *-sun-solaris*) # GCC on solaris seems to accept just about anything, not # that what it defines actually works... So just hardwire # to the right answer opal_cv_asm_type="#" ;; *) for type in @ \# % ; do asm_result=0 echo "configure: trying $type" >&AC_FD_CC OPAL_TRY_ASSEMBLE([ .type mysym, ${type}function mysym:], [opal_cv_asm_type="${type}" asm_result=1]) if test "$asm_result" = "1" ; then break fi done ;; esac rm -f conftest.out unset asm_result type ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_ASM_SIZE dnl dnl Sets OPAL_ASM_SIZE to 1 if we should set .size directives for dnl each function, 0 otherwise. dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_ASM_SIZE],[ AC_CACHE_CHECK([if .size is needed], [opal_cv_asm_need_size], [opal_cv_asm_need_size="no" OPAL_TRY_ASSEMBLE([ .size mysym, 1], [opal_cv_asm_need_size="yes"]) rm -f conftest.out]) if test "$opal_cv_asm_need_size" = "yes" ; then opal_asm_size=1 else opal_asm_size=0 fi AC_DEFINE_UNQUOTED([OPAL_ASM_SIZE], ["$opal_asm_size"], [Do we need to give a .size directive]) OPAL_ASM_SIZE="$opal_asm_size" AC_SUBST(OPAL_ASM_TYPE) unset asm_result ])dnl # OPAL_CHECK_ASM_GNU_STACKEXEC(var) # ---------------------------------- # sets shell variable var to the things necessary to # disable execable stacks with GAS AC_DEFUN([OPAL_CHECK_ASM_GNU_STACKEXEC], [ AC_REQUIRE([AC_PROG_GREP]) AC_CHECK_PROG([OBJDUMP], [objdump], [objdump]) AC_CACHE_CHECK([if .note.GNU-stack is needed], [opal_cv_asm_gnu_stack_result], [AS_IF([test "$OBJDUMP" != ""], [ # first, see if a simple C program has it set cat >conftest.c < /dev/null && opal_cv_asm_gnu_stack_result=yes], [OPAL_LOG_MSG([the failed program was:], 1) OPAL_LOG_FILE([conftest.c]) opal_cv_asm_gnu_stack_result=no]) if test "$opal_cv_asm_gnu_stack_result" != "yes" ; then opal_cv_asm_gnu_stack_result="no" fi rm -rf conftest.*], [opal_cv_asm_gnu_stack_result="no"])]) if test "$opal_cv_asm_gnu_stack_result" = "yes" ; then opal_cv_asm_gnu_stack=1 else opal_cv_asm_gnu_stack=0 fi ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_POWERPC_REG dnl dnl See if the notation for specifying registers is X (most everyone) dnl or rX (OS X) dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_POWERPC_REG],[ AC_MSG_CHECKING([if PowerPC registers have r prefix]) OPAL_TRY_ASSEMBLE([$opal_cv_asm_text addi 1,1,0], [opal_cv_asm_powerpc_r_reg=0], [OPAL_TRY_ASSEMBLE([$opal_cv_asm_text addi r1,r1,0], [opal_cv_asm_powerpc_r_reg=1], [AC_MSG_ERROR([Can not determine how to use PPC registers])])]) if test "$opal_cv_asm_powerpc_r_reg" = "1" ; then AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) fi AC_DEFINE_UNQUOTED([OPAL_POWERPC_R_REGISTERS], [$opal_cv_asm_powerpc_r_reg], [Whether r notation is used for ppc registers]) ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_POWERPC_64BIT dnl dnl On some powerpc chips (the PPC970 or G5), the OS usually runs in dnl 32 bit mode, even though the hardware can do 64bit things. If dnl the compiler will let us, emit code for 64bit test and set type dnl operations (on a long long). dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_POWERPC_64BIT],[ if test "$ac_cv_sizeof_long" != "4" ; then # this function should only be called in the 32 bit case AC_MSG_ERROR([CHECK_POWERPC_64BIT called on 64 bit platform. Internal error.]) fi AC_MSG_CHECKING([for 64-bit PowerPC assembly support]) case $host in *-darwin*) ppc64_result=0 if test "$opal_cv_asm_powerpc_r_reg" = "1" ; then ldarx_asm=" ldarx r1,r1,r1"; else ldarx_asm=" ldarx 1,1,1"; fi OPAL_TRY_ASSEMBLE([$opal_cv_asm_text $ldarx_asm], [ppc64_result=1], [ppc64_result=0]) ;; *) ppc64_result=0 ;; esac if test "$ppc64_result" = "1" ; then AC_MSG_RESULT([yes]) ifelse([$1],,:,[$1]) else AC_MSG_RESULT([no]) ifelse([$2],,:,[$2]) fi unset ppc64_result ldarx_asm ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_SPARCV8PLUS dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_SPARCV8PLUS],[ AC_MSG_CHECKING([if have Sparc v8+/v9 support]) sparc_result=0 OPAL_TRY_ASSEMBLE([$opal_cv_asm_text casa [%o0] 0x80, %o1, %o2], [sparc_result=1], [sparc_result=0]) if test "$sparc_result" = "1" ; then AC_MSG_RESULT([yes]) ifelse([$1],,:,[$1]) else AC_MSG_RESULT([no]) ifelse([$2],,:,[$2]) fi unset sparc_result ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_CMPXCHG16B dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_CMPXCHG16B],[ OPAL_VAR_SCOPE_PUSH([cmpxchg16b_result]) AC_ARG_ENABLE([cross-cmpxchg16b],[AC_HELP_STRING([--enable-cross-cmpxchg16b], [enable the use of the cmpxchg16b instruction when cross compiling])]) if test ! "$enable_cross_cmpxchg16b" = "yes" ; then AC_MSG_CHECKING([if processor supports x86_64 16-byte compare-and-exchange]) AC_RUN_IFELSE([AC_LANG_PROGRAM([[unsigned char tmp[16];]],[[ __asm__ __volatile__ ("lock cmpxchg16b (%%rsi)" : : "S" (tmp) : "memory", "cc");]])], [AC_MSG_RESULT([yes]) cmpxchg16b_result=1], [AC_MSG_RESULT([no]) cmpxchg16b_result=0], [AC_MSG_RESULT([no (cross-compiling)]) cmpxchg16b_result=0]) else AC_MSG_CHECKING([if assembler supports x86_64 16-byte compare-and-exchange]) OPAL_TRY_ASSEMBLE([$opal_cv_asm_text cmpxchg16b 0], [AC_MSG_RESULT([yes]) cmpxchg16b_result=1], [AC_MSG_RESULT([no]) cmpxchg16b_result=0]) fi if test "$cmpxchg16b_result" = 1; then AC_MSG_CHECKING([if compiler correctly handles volatile 128bits]) AC_RUN_IFELSE([AC_LANG_PROGRAM([#include #include union opal_counted_pointer_t { struct { uint64_t counter; uint64_t item; } data; #if defined(HAVE___INT128) && HAVE___INT128 __int128 value; #elif defined(HAVE_INT128_T) && HAVE_INT128_T int128_t value; #endif }; typedef union opal_counted_pointer_t opal_counted_pointer_t;], [volatile opal_counted_pointer_t a; opal_counted_pointer_t b; a.data.counter = 0; a.data.item = 0x1234567890ABCDEF; b.data.counter = a.data.counter; b.data.item = a.data.item; /* bozo checks */ assert(16 == sizeof(opal_counted_pointer_t)); assert(a.data.counter == b.data.counter); assert(a.data.item == b.data.item); /* * the following test fails on buggy compilers * so far, with icc -o conftest conftest.c * - intel icc 14.0.0.080 (aka 2013sp1) * - intel icc 14.0.1.106 (aka 2013sp1u1) * older and more recents compilers work fine * buggy compilers work also fine but only with -O0 */ #if (defined(HAVE___INT128) && HAVE___INT128) || (defined(HAVE_INT128_T) && HAVE_INT128_T) return (a.value != b.value); #else return 0; #endif])], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) cmpxchg16b_result=0], [AC_MSG_RESULT([untested, assuming ok])]) fi AC_DEFINE_UNQUOTED([OPAL_HAVE_CMPXCHG16B], [$cmpxchg16b_result], [Whether the processor supports the cmpxchg16b instruction]) OPAL_VAR_SCOPE_POP ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_INLINE_GCC dnl dnl Check if the compiler is capable of doing GCC-style inline dnl assembly. Some compilers emit a warning and ignore the inline dnl assembly (xlc on OS X) and compile without error. Therefore, dnl the test attempts to run the emited code to check that the dnl assembly is actually run. To run this test, one argument to dnl the macro must be an assembly instruction in gcc format to move dnl the value 0 into the register containing the variable ret. dnl For PowerPC, this would be: dnl dnl "li %0,0" : "=&r"(ret) dnl dnl For testing ia32 assembly, the assembly instruction xaddl is dnl tested. The xaddl instruction is used by some of the atomic dnl implementations so it makes sense to test for it. In addition, dnl some compilers (i.e. earlier versions of Sun Studio 12) do not dnl necessarily handle xaddl properly, so that needs to be detected dnl during configure time. dnl dnl DEFINE OPAL_GCC_INLINE_ASSEMBLY to 0 or 1 depending on GCC dnl support dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_INLINE_C_GCC],[ assembly="$1" asm_result="unknown" AC_MSG_CHECKING([if $CC supports GCC inline assembly]) if test "$opal_cv_c_compiler_vendor" = "portland group" ; then # PGI seems to have some issues with our inline assembly. # Disable for now. asm_result="no (Portland Group)" else if test ! "$assembly" = "" ; then AC_RUN_IFELSE([AC_LANG_PROGRAM([ AC_INCLUDES_DEFAULT], [[int ret = 1; int negone = -1; __asm__ __volatile__ ($assembly); return ret;]])], [asm_result="yes"], [asm_result="no"], [asm_result="unknown"]) else assembly="test skipped - assuming no" fi # if we're cross compiling, just try to compile and figure good enough if test "$asm_result" = "unknown" ; then AC_LINK_IFELSE([AC_LANG_PROGRAM([ AC_INCLUDES_DEFAULT], [[int ret = 1; int negone = -1; __asm__ __volatile__ ($assembly); return ret;]])], [asm_result="yes"], [asm_result="no"]) fi fi AC_MSG_RESULT([$asm_result]) if test "$asm_result" = "yes" ; then OPAL_C_GCC_INLINE_ASSEMBLY=1 else OPAL_C_GCC_INLINE_ASSEMBLY=0 fi AC_DEFINE_UNQUOTED([OPAL_C_GCC_INLINE_ASSEMBLY], [$OPAL_C_GCC_INLINE_ASSEMBLY], [Whether C compiler supports GCC style inline assembly]) unset OPAL_C_GCC_INLINE_ASSEMBLY assembly asm_result ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_INLINE_DEC dnl dnl DEFINE OPAL_DEC to 0 or 1 depending on DEC dnl support dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_INLINE_C_DEC],[ AC_MSG_CHECKING([if $CC supports DEC inline assembly]) AC_LINK_IFELSE([AC_LANG_PROGRAM([ AC_INCLUDES_DEFAULT #include ], [[asm(""); return 0;]])], [asm_result="yes"], [asm_result="no"]) AC_MSG_RESULT([$asm_result]) if test "$asm_result" = "yes" ; then OPAL_C_DEC_INLINE_ASSEMBLY=1 else OPAL_C_DEC_INLINE_ASSEMBLY=0 fi AC_DEFINE_UNQUOTED([OPAL_C_DEC_INLINE_ASSEMBLY], [$OPAL_C_DEC_INLINE_ASSEMBLY], [Whether C compiler supports DEC style inline assembly]) unset OPAL_C_DEC_INLINE_ASSEMBLY asm_result ])dnl dnl ################################################################# dnl dnl OPAL_CHECK_INLINE_XLC dnl dnl DEFINE OPAL_XLC to 0 or 1 depending on XLC dnl support dnl dnl ################################################################# AC_DEFUN([OPAL_CHECK_INLINE_C_XLC],[ AC_MSG_CHECKING([if $CC supports XLC inline assembly]) OPAL_C_XLC_INLINE_ASSEMBLY=0 asm_result="no" if test "$CC" = "xlc" ; then OPAL_XLC_INLINE_ASSEMBLY=1 asm_result="yes" fi AC_MSG_RESULT([$asm_result]) AC_DEFINE_UNQUOTED([OPAL_C_XLC_INLINE_ASSEMBLY], [$OPAL_C_XLC_INLINE_ASSEMBLY], [Whether C compiler supports XLC style inline assembly]) unset OPAL_C_XLC_INLINE_ASSEMBLY ])dnl dnl ################################################################# dnl dnl OPAL_CONFIG_ASM dnl dnl DEFINE OPAL_ASSEMBLY_ARCH to something in sys/architecture.h dnl DEFINE OPAL_ASSEMBLY_FORMAT to string containing correct dnl format for assembly (not user friendly) dnl SUBST OPAL_ASSEMBLY_FORMAT to string containing correct dnl format for assembly (not user friendly) dnl dnl ################################################################# AC_DEFUN([OPAL_CONFIG_ASM],[ AC_REQUIRE([OPAL_SETUP_CC]) AC_REQUIRE([AM_PROG_AS]) AC_ARG_ENABLE([builtin-atomics], [AC_HELP_STRING([--enable-builtin-atomics], [Enable use of __sync builtin atomics (default: enabled)])], [], [enable_builtin_atomics="yes"]) AC_ARG_ENABLE([osx-builtin-atomics], [AC_HELP_STRING([--enable-osx-builtin-atomics], [Enable use of OSX builtin atomics (default: enabled)])], [], [enable_osx_builtin_atomics="yes"]) opal_cv_asm_builtin="BUILTIN_NO" if test "$opal_cv_asm_builtin" = "BUILTIN_NO" && test "$enable_builtin_atomics" = "yes" ; then OPAL_CHECK_GCC_ATOMIC_BUILTINS([opal_cv_asm_builtin="BUILTIN_GCC"], []) fi if test "$opal_cv_asm_builtin" = "BUILTIN_NO" && test "$enable_builtin_atomics" = "yes" ; then OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], []) fi if test "$opal_cv_asm_builtin" = "BUILTIN_NO" && test "$enable_osx_builtin_atomics" = "yes" ; then AC_CHECK_HEADER([libkern/OSAtomic.h], [opal_cv_asm_builtin="BUILTIN_OSX"]) fi OPAL_CHECK_ASM_PROC OPAL_CHECK_ASM_TEXT OPAL_CHECK_ASM_GLOBAL OPAL_CHECK_ASM_GNU_STACKEXEC OPAL_CHECK_ASM_LABEL_SUFFIX OPAL_CHECK_ASM_GSYM OPAL_CHECK_ASM_LSYM OPAL_CHECK_ASM_TYPE OPAL_CHECK_ASM_SIZE OPAL_CHECK_ASM_ALIGN_LOG # find our architecture for purposes of assembly stuff opal_cv_asm_arch="UNSUPPORTED" OPAL_GCC_INLINE_ASSIGN="" OPAL_ASM_SUPPORT_64BIT=0 case "${host}" in i?86-*|x86_64*) if test "$ac_cv_sizeof_long" = "4" ; then opal_cv_asm_arch="IA32" else opal_cv_asm_arch="AMD64" fi OPAL_ASM_SUPPORT_64BIT=1 OPAL_GCC_INLINE_ASSIGN='"xaddl %1,%0" : "=m"(ret), "+r"(negone) : "m"(ret)' OPAL_CHECK_CMPXCHG16B ;; ia64-*) opal_cv_asm_arch="IA64" OPAL_ASM_SUPPORT_64BIT=1 OPAL_GCC_INLINE_ASSIGN='"mov %0=r0\n;;\n" : "=&r"(ret)' ;; aarch64*) opal_cv_asm_arch="ARM64" OPAL_ASM_SUPPORT_64BIT=1 OPAL_ASM_ARM_VERSION=8 AC_DEFINE_UNQUOTED([OPAL_ASM_ARM_VERSION], [$OPAL_ASM_ARM_VERSION], [What ARM assembly version to use]) OPAL_GCC_INLINE_ASSIGN='"mov %0, #0" : "=&r"(ret)' ;; armv7*) opal_cv_asm_arch="ARM" OPAL_ASM_SUPPORT_64BIT=1 OPAL_ASM_ARM_VERSION=7 AC_DEFINE_UNQUOTED([OPAL_ASM_ARM_VERSION], [$OPAL_ASM_ARM_VERSION], [What ARM assembly version to use]) OPAL_GCC_INLINE_ASSIGN='"mov %0, #0" : "=&r"(ret)' ;; armv6*) opal_cv_asm_arch="ARM" OPAL_ASM_SUPPORT_64BIT=0 OPAL_ASM_ARM_VERSION=6 CCASFLAGS="$CCASFLAGS -march=armv7-a" AC_DEFINE_UNQUOTED([OPAL_ASM_ARM_VERSION], [$OPAL_ASM_ARM_VERSION], [What ARM assembly version to use]) OPAL_GCC_INLINE_ASSIGN='"mov %0, #0" : "=&r"(ret)' ;; armv5*linux*|armv4*linux*) # uses Linux kernel helpers for some atomic operations opal_cv_asm_arch="ARM" OPAL_ASM_SUPPORT_64BIT=0 OPAL_ASM_ARM_VERSION=5 CCASFLAGS="$CCASFLAGS -march=armv7-a" AC_DEFINE_UNQUOTED([OPAL_ASM_ARM_VERSION], [$OPAL_ASM_ARM_VERSION], [What ARM assembly version to use]) OPAL_GCC_INLINE_ASSIGN='"mov %0, #0" : "=&r"(ret)' ;; mips-*|mips64*) # Should really find some way to make sure that we are on # a MIPS III machine (r4000 and later) opal_cv_asm_arch="MIPS" OPAL_ASM_SUPPORT_64BIT=1 OPAL_GCC_INLINE_ASSIGN='"or %0,[$]0,[$]0" : "=&r"(ret)' ;; powerpc-*|powerpc64-*|powerpcle-*|powerpc64le-*|rs6000-*|ppc-*) OPAL_CHECK_POWERPC_REG if test "$ac_cv_sizeof_long" = "4" ; then opal_cv_asm_arch="POWERPC32" # Note that on some platforms (Apple G5), even if we are # compiling in 32 bit mode (and therefore should assume # sizeof(long) == 4), we can use the 64 bit test and set # operations. OPAL_CHECK_POWERPC_64BIT(OPAL_ASM_SUPPORT_64BIT=1) elif test "$ac_cv_sizeof_long" = "8" ; then OPAL_ASM_SUPPORT_64BIT=1 opal_cv_asm_arch="POWERPC64" else AC_MSG_ERROR([Could not determine PowerPC word size: $ac_cv_sizeof_long]) fi OPAL_GCC_INLINE_ASSIGN='"1: li %0,0" : "=&r"(ret)' ;; sparc*-*) # SPARC v9 (and above) are the only ones with 64bit support # if compiling 32 bit, see if we are v9 (aka v8plus) or # earlier (casa is v8+/v9). if test "$ac_cv_sizeof_long" = "4" ; then have_v8plus=0 OPAL_CHECK_SPARCV8PLUS([have_v8plus=1]) if test "$have_v8plus" = "0" ; then OPAL_ASM_SUPPORT_64BIT=0 opal_cv_asm_arch="SPARC" AC_MSG_WARN([Sparc v8 target is not supported in this release of Open MPI.]) AC_MSG_WARN([You must specify the target architecture v8plus to compile]) AC_MSG_WARN([Open MPI in 32 bit mode on Sparc processors (see the README).]) AC_MSG_ERROR([Can not continue.]) else OPAL_ASM_SUPPORT_64BIT=1 opal_cv_asm_arch="SPARCV9_32" fi elif test "$ac_cv_sizeof_long" = "8" ; then OPAL_ASM_SUPPORT_64BIT=1 opal_cv_asm_arch="SPARCV9_64" else AC_MSG_ERROR([Could not determine Sparc word size: $ac_cv_sizeof_long]) fi OPAL_GCC_INLINE_ASSIGN='"mov 0,%0" : "=&r"(ret)' ;; *) OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], [AC_MSG_ERROR([No atomic primitives available for $host])]) ;; esac if test "x$OPAL_ASM_SUPPORT_64BIT" = "x1" && test "$opal_cv_asm_builtin" = "BUILTIN_SYNC" && test "$opal_asm_sync_have_64bit" = "0" ; then # __sync builtins exist but do not implement 64-bit support. Fall back on inline asm. opal_cv_asm_builtin="BUILTIN_NO" fi if test "$opal_cv_asm_builtin" = "BUILTIN_SYNC" || test "$opal_cv_asm_builtin" = "BUILTIN_GCC" ; then AC_DEFINE([OPAL_C_GCC_INLINE_ASSEMBLY], [1], [Whether C compiler supports GCC style inline assembly]) else AC_DEFINE_UNQUOTED([OPAL_ASM_SUPPORT_64BIT], [$OPAL_ASM_SUPPORT_64BIT], [Whether we can do 64bit assembly operations or not. Should not be used outside of the assembly header files]) AC_SUBST([OPAL_ASM_SUPPORT_64BIT]) # # figure out if we need any special function start / stop code # case $host_os in aix*) opal_asm_arch_config="aix" ;; *) opal_asm_arch_config="default" ;; esac # now that we know our architecture, try to inline assemble OPAL_CHECK_INLINE_C_GCC([$OPAL_GCC_INLINE_ASSIGN]) OPAL_CHECK_INLINE_C_DEC OPAL_CHECK_INLINE_C_XLC # format: # config_file-text-global-label_suffix-gsym-lsym-type-size-align_log-ppc_r_reg-64_bit-gnu_stack asm_format="${opal_asm_arch_config}" asm_format="${asm_format}-${opal_cv_asm_text}-${opal_cv_asm_global}" asm_format="${asm_format}-${opal_cv_asm_label_suffix}-${opal_cv_asm_gsym}" asm_format="${asm_format}-${opal_cv_asm_lsym}" asm_format="${asm_format}-${opal_cv_asm_type}-${opal_asm_size}" asm_format="${asm_format}-${opal_asm_align_log_result}" if test "$opal_cv_asm_arch" = "POWERPC32" || test "$opal_cv_asm_arch" = "POWERPC64" ; then asm_format="${asm_format}-${opal_cv_asm_powerpc_r_reg}" else asm_format="${asm_format}-1" fi asm_format="${asm_format}-${OPAL_ASM_SUPPORT_64BIT}" opal_cv_asm_format="${asm_format}-${opal_cv_asm_gnu_stack}" # For the Makefile, need to escape the $ as $$. Don't display # this version, but make sure the Makefile gives the right thing # when regenerating the files because the base has been touched. OPAL_ASSEMBLY_FORMAT=`echo "$opal_cv_asm_format" | sed -e 's/\\\$/\\\$\\\$/'` AC_MSG_CHECKING([for assembly format]) AC_MSG_RESULT([$opal_cv_asm_format]) AC_DEFINE_UNQUOTED([OPAL_ASSEMBLY_FORMAT], ["$OPAL_ASSEMBLY_FORMAT"], [Format of assembly file]) AC_SUBST([OPAL_ASSEMBLY_FORMAT]) fi # if opal_cv_asm_builtin = BUILTIN_SYNC result="OPAL_$opal_cv_asm_arch" OPAL_ASSEMBLY_ARCH="$opal_cv_asm_arch" AC_MSG_CHECKING([for assembly architecture]) AC_MSG_RESULT([$opal_cv_asm_arch]) AC_DEFINE_UNQUOTED([OPAL_ASSEMBLY_ARCH], [$result], [Architecture type of assembly to use for atomic operations and CMA]) AC_SUBST([OPAL_ASSEMBLY_ARCH]) # Check for RDTSCP support result=0 AS_IF([test "$opal_cv_asm_arch" = "OPAL_AMD64" || test "$opal_cv_asm_arch" = "OPAL_IA32"], [AC_MSG_CHECKING([for RDTSCP assembly support]) AC_LANG_PUSH([C]) AC_TRY_RUN([[ int main(int argc, char* argv[]) { unsigned int rax, rdx; __asm__ __volatile__ ("rdtscp\n": "=a" (rax), "=d" (rdx):: "%rax", "%rdx"); return 0; } ]], [result=1 AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])], [#cross compile not supported AC_MSG_RESULT(["no (cross compiling)"])]) AC_LANG_POP([C])]) AC_DEFINE_UNQUOTED([OPAL_ASSEMBLY_SUPPORTS_RDTSCP], [$result], [Whether we have support for RDTSCP instruction]) result="OPAL_$opal_cv_asm_builtin" OPAL_ASSEMBLY_BUILTIN="$opal_cv_asm_builtin" AC_MSG_CHECKING([for builtin atomics]) AC_MSG_RESULT([$opal_cv_asm_builtin]) AC_DEFINE_UNQUOTED([OPAL_ASSEMBLY_BUILTIN], [$result], [Whether to use builtin atomics]) AC_SUBST([OPAL_ASSEMBLY_BUILTIN]) OPAL_ASM_FIND_FILE unset result asm_format ])dnl dnl ################################################################# dnl dnl OPAL_ASM_FIND_FILE dnl dnl dnl do all the evil mojo to provide a working assembly file dnl dnl ################################################################# AC_DEFUN([OPAL_ASM_FIND_FILE], [ AC_REQUIRE([AC_PROG_GREP]) AC_REQUIRE([AC_PROG_FGREP]) if test "$opal_cv_asm_arch" != "WINDOWS" && test "$opal_cv_asm_builtin" != "BUILTIN_SYNC" && test "$opal_cv_asm_builtin" != "BUILTIN_OSX" ; then AC_CHECK_PROG([PERL], [perl], [perl]) # see if we have a pre-built one already AC_MSG_CHECKING([for pre-built assembly file]) opal_cv_asm_file="" if $GREP "$opal_cv_asm_arch" "${OPAL_TOP_SRCDIR}/opal/asm/asm-data.txt" | $FGREP "$opal_cv_asm_format" >conftest.out 2>&1 ; then opal_cv_asm_file="`cut -f3 conftest.out`" if test ! "$opal_cv_asm_file" = "" ; then opal_cv_asm_file="atomic-${opal_cv_asm_file}.s" if test -f "${OPAL_TOP_SRCDIR}/opal/asm/generated/${opal_cv_asm_file}" ; then AC_MSG_RESULT([yes ($opal_cv_asm_file)]) else AC_MSG_RESULT([no ($opal_cv_asm_file not found)]) opal_cv_asm_file="" fi fi else AC_MSG_RESULT([no (not in asm-data)]) fi rm -rf conftest.* if test "$opal_cv_asm_file" = "" ; then if test ! "$PERL" = "" ; then # we have perl... Can we generate a file? AC_MSG_CHECKING([whether possible to generate assembly file]) mkdir -p opal/asm/generated opal_cv_asm_file="atomic-local.s" opal_try='$PERL $OPAL_TOP_SRCDIR/opal/asm/generate-asm.pl $opal_cv_asm_arch "$opal_cv_asm_format" $OPAL_TOP_SRCDIR/opal/asm/base $OPAL_TOP_BUILDDIR/opal/asm/generated/$opal_cv_asm_file >conftest.out 2>&1' if AC_TRY_EVAL(opal_try) ; then # save the warnings cat conftest.out >&AC_FD_CC AC_MSG_RESULT([yes]) else # save output cat conftest.out >&AC_FD_CC opal_cv_asm_file="" AC_MSG_RESULT([failed]) AC_MSG_WARN([Could not build atomic operations assembly file.]) AC_MSG_WARN([There will be no atomic operations for this build.]) fi else AC_MSG_WARN([Could not find prebuilt atomic operations file and could not]) AC_MSG_WARN([find perl to attempt to generate a custom assembly file.]) AC_MSG_WARN([There will be no atomic operations for this build.]) fi fi rm -rf conftest.* else # On windows with VC++, atomics are done with compiler primitives opal_cv_asm_file="" fi AC_MSG_CHECKING([for atomic assembly filename]) if test "$opal_cv_asm_file" = "" ; then AC_MSG_RESULT([none]) result=0 else AC_MSG_RESULT([$opal_cv_asm_file]) result=1 fi AC_DEFINE_UNQUOTED([OPAL_HAVE_ASM_FILE], [$result], [Whether there is an atomic assembly file available]) AM_CONDITIONAL([OPAL_HAVE_ASM_FILE], [test "$result" = "1"]) OPAL_ASM_FILE=$opal_cv_asm_file AC_SUBST(OPAL_ASM_FILE) ])dnl