90 строки
2.2 KiB
Bash
90 строки
2.2 KiB
Bash
dnl -*- shell-script -*-
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dnl
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dnl $HEADER$
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dnl
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dnl $Id: lam_setup_cc.m4,v 1.1 2004/01/07 07:42:50 jsquyres Exp $
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dnl
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AC_DEFUN(LAM_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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lam_show_subtitle "C compiler and preprocessor"
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# $%@#!@#% AIX!! This has to be called before anything invokes the C
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# compiler.
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dnl AC_AIX
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#
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# Do we want debugging? - down here so we can change CFLAGS
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#
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AC_MSG_CHECKING([if want debugging output support])
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AC_ARG_WITH(debug,
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[ --with-debug enable debugging output (maintainers only)])
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if test -n "$with_debug" -a "$with_debug" = "yes"; then
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AC_MSG_RESULT([yes])
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WANT_DEBUG=1
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else
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AC_MSG_RESULT([no])
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WANT_DEBUG=0
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fi
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AC_DEFINE_UNQUOTED(LAM_WANT_DEBUG, $WANT_DEBUG, [LAM debug flag])
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#
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# Check for the compiler
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#
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lam_cflags_save="$CFLAGS"
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AC_PROG_CC
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BASECC="`basename $CC`"
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CFLAGS="$lam_cflags_save"
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AC_DEFINE_UNQUOTED(LAM_CC, "$CC", [LAM underlying C compiler])
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# When building LAM, we need this everywhere
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CPPFLAGS="$CPPFLAGS -DLAM_BUILDING=1"
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# Do we want debugging?
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if test "$WANT_DEBUG" = "1"; then
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if test "$GCC" = "yes"; then
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add="-g -Wall -Wundef -Wno-long-long"
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add="$add -Wmissing-prototypes -Wstrict-prototypes"
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# see if -Wno-long-double works...
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CFLAGS_orig="$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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else
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add="-g"
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fi
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CFLAGS="$CFLAGS $add"
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LAM_UNIQ(CFLAGS)
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AC_MSG_WARN([$add has been added to CFLAGS (--with-debug)])
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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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if test "$GCC" = yes; then
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OPTFLAGS="-O3"
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else
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OPTFLAGS="-O"
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fi
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LAM_CHECK_OPTFLAGS("$CFLAGS")
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AC_MSG_CHECKING([for C optimization flags])
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AC_MSG_RESULT([$co_result])
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CFLAGS="$co_result"
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])
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