174 строки
4.5 KiB
Bash
174 строки
4.5 KiB
Bash
dnl -*- shell-script -*-
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dnl
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dnl Copyright (c) 2004-2005 The Trustees of Indiana University.
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dnl All rights reserved.
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dnl Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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dnl All rights reserved.
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dnl Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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dnl University of Stuttgart. All rights reserved.
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dnl Copyright (c) 2004-2005 The Regents of the University of California.
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dnl All rights reserved.
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dnl $COPYRIGHT$
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dnl
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dnl Additional copyrights may follow
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dnl
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dnl $HEADER$
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dnl
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AC_DEFUN([OMPI_SETUP_CC],[
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# Modularize this setup so that sub-configure.in scripts can use this
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# same setup code.
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ompi_show_subtitle "C compiler and preprocessor"
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# $%@#!@#% AIX!! This has to be called before anything invokes the C
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# compiler.
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dnl AC_AIX
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#
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# Check for the compiler
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#
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ompi_cflags_save="$CFLAGS"
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AC_PROG_CC
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BASECC="`basename $CC`"
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CFLAGS="$ompi_cflags_save"
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AC_DEFINE_UNQUOTED(OMPI_CC, "$CC", [OMPI underlying C compiler])
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# When building OMPI, we need this everywhere
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CPPFLAGS="$CPPFLAGS -DOMPI_BUILDING=1"
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# Check for compilers that impersonate gcc
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AC_MSG_CHECKING([for compilers that impersonate gcc])
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msg=
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TRULY_GCC=$GCC
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if test "$GCC" = "yes"; then
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AC_TRY_COMPILE([], [
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int i = 3;
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#if __INTEL_COMPILER
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#error Yes, I am lying about being gcc.
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#endif
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], [], [msg=intel])
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# If we made it through unscathed, then it really is gcc
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if test -z "$msg"; then
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TRULY_GCC=yes
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else
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TRULY_GCC=no
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fi
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else
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# We never thought that this was gcc to begin with
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msg="not applicable"
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TRULY_GCC=no
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fi
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AC_MSG_RESULT([$msg])
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# Do we want debugging?
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if test "$WANT_DEBUG" = "1"; then
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CFLAGS="$CFLAGS -g"
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OMPI_UNIQ(CFLAGS)
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AC_MSG_WARN([-g has been added to CFLAGS (--enable-debug)])
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fi
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# These flags are generally gcc-specific; even the gcc-impersonating
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# compilers won't accept them.
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OMPI_CFLAGS_BEFORE_PICKY="$CFLAGS"
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if test "$TRULY_GCC" = "yes" -a "$WANT_PICKY_COMPILER" = 1; then
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add="-Wall -Wundef -Wno-long-long -Wsign-compare"
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add="$add -Wmissing-prototypes -Wstrict-prototypes"
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add="$add -Wcomment -pedantic"
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# see if -Wno-long-double works...
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CFLAGS_orig="$CFLAGS"
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CFLAGS="$CFLAGS -Wno-long-double"
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AC_TRY_COMPILE([], [], add="$add -Wno-long-double")
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CFLAGS="$CFLAGS_orig"
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add="$add -Werror-implicit-function-declaration "
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CFLAGS="$CFLAGS $add"
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OMPI_UNIQ(CFLAGS)
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AC_MSG_WARN([$add has been added to CFLAGS (--enable-picky)])
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unset add
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fi
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# See if this version of gcc allows -finline-functions and/or
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# -fno-strict-aliasing. Even check the gcc-impersonating compilers.
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if test "$GCC" = "yes"; then
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CFLAGS_orig="$CFLAGS"
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CFLAGS="$CFLAGS_orig -finline-functions"
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add=
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AC_TRY_COMPILE([], [], add=" -finline-functions")
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CFLAGS="$CFLAGS_orig$add"
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CFLAGS="$CFLAGS_orig -fno-strict-aliasing"
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add=
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AC_TRY_COMPILE([], [], add=" -fno-strict-aliasing")
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CFLAGS="$CFLAGS_orig$add"
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OMPI_UNIQ(CFLAGS)
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AC_MSG_WARN([$add has been added to CFLAGS])
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unset add
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fi
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# Try to enable restrict keyword
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RESTRICT_CFLAGS=
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case "${host}" in
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ia64-unknown-linux*)
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if test "$CC" = "ecc" ; then
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RESTRICT_CFLAGS="-restrict"
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fi
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;;
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mips-sgi-irix*)
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if test "$CC" = "cc" ; then
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RESTRICT_CFLAGS="-LANG:restrict=ON"
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fi
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;;
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i?86-pc-linux*)
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if test "$CC" = "icc" ; then
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RESTRICT_CFLAGS="-restrict"
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fi
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;;
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esac
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if test ! -z "$RESTRICT_CFLAGS" ; then
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CFLAGS_orig="$CFLAGS"
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CFLAGS="$CFLAGS_orig $RESTRICT_CFLAGS"
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add=
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AC_TRY_COMPILE([], [], add=" $RESTRICT_CFLAGS")
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CFLAGS="${CFLAGS_orig}${add}"
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OMPI_UNIQ(CFLAGS)
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AC_MSG_WARN([$add has been added to CFLAGS])
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unset add
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fi
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# Preload the optflags for the case where the user didn't specify any.
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# If we're using GNU compilers, use -O3 (since it GNU doesn't require
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# all compilation units to be compiled with the same level of
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# optimization -- selecting a high level of optimization is not
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# prohibitive). If we're using anything else, be conservative and
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# just use -O.
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# Note: gcc-imperonating compilers accept -O3, so there's no need for
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# $TRULY_GCC here.
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if test "$GCC" = yes; then
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OPTFLAGS="-O3"
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else
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OPTFLAGS="-O"
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fi
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OMPI_CHECK_OPTFLAGS("$OMPI_CFLAGS_BEFORE_PICKY")
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OMPI_CFLAGS_BEFORE_PICKY="$co_result"
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AC_MSG_CHECKING([for C optimization flags])
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OMPI_CHECK_OPTFLAGS("$CFLAGS")
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AC_MSG_RESULT([$co_result])
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CFLAGS="$co_result"])
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