e076645382
Part of #447. * configure.ac, m4/debug.m4, m4/devel.m4, m4/gccoptim.m4, m4/ndebug.m4: Replace AC_ERROR and AC_HELP_STRING by by AC_MSG_ERROR and AS_HELP_STRING.
59 lines
1.8 KiB
Text
59 lines
1.8 KiB
Text
dnl Adapted from Akim Demaille <akim@epita.fr> ad_GCC_WARNINGS.
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AC_DEFUN([ad_GCC_OPTIM],
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[AC_ARG_ENABLE([optimizations],
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[AS_HELP_STRING([--disable-optimizations],
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[turn off aggressive optimizations])])
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if test -n "$GCC" && test "${enable_optimizations-yes}" = "yes"; then
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AC_CACHE_CHECK([for gcc optimization options], ac_cv_prog_gcc_opt_flags,
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[changequote(,)dnl
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cat > conftest.$ac_ext <<EOF
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#line __oline__ "configure"
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int main(int argc, char *argv[]) { return argv[argc-1] == 0; }
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EOF
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changequote([,])dnl
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AC_LANG_PUSH([C])
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cf_save_CFLAGS="$CFLAGS"
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ac_cv_prog_gcc_opt_flags="-O3"
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for cf_opt in \
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ffast-math \
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fstrict-aliasing \
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fomit-frame-pointer
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do
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CFLAGS="$cf_save_CFLAGS $ac_cv_prog_gcc_opt_flags -$cf_opt"
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if AC_TRY_EVAL([ac_compile]); then
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ac_cv_prog_gcc_opt_flags="$ac_cv_prog_gcc_opt_flags -$cf_opt"
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fi
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done
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rm -f conftest*
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AC_LANG_POP([C])
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CFLAGS="$cf_save_CFLAGS $ac_cv_prog_gcc_opt_flags"])
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AC_CACHE_CHECK([for g++ optimization options], ac_cv_prog_gxx_opt_flags,
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[changequote(,)dnl
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cat > conftest.$ac_ext <<EOF
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#line __oline__ "configure"
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int main(int argc, char *argv[]) { return argv[argc-1] == 0; }
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EOF
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changequote([,])dnl
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AC_LANG_PUSH([C++])
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cf_save_CXXFLAGS="$CXXFLAGS"
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ac_cv_prog_gxx_opt_flags="-O3"
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for cf_opt in \
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ffast-math \
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fstrict-aliasing \
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fomit-frame-pointer
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do
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CXXFLAGS="$cf_save_CXXFLAGS $ac_cv_prog_gxx_opt_flags -$cf_opt"
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if AC_TRY_EVAL([ac_compile]); then
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ac_cv_prog_gxx_opt_flags="$ac_cv_prog_gxx_opt_flags -$cf_opt"
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fi
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done
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rm -f conftest*
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AC_LANG_POP([C++])
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CXXFLAGS="$cf_save_CXXFLAGS $ac_cv_prog_gxx_opt_flags"])
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else
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case $enable_optimizations in
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no) ;;
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*) CXXFLAGS="$CXXFLAGS $enable_optimizations"
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CFLAGS="$CFLAGS $enable_optimizations" ;;
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esac
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fi])
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