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#=========================================================================
# aclocal.m4 for maven libgloss
#=========================================================================
# We cannot use the normal AC_PROG_CC since that macro will try and do a
# link with the found compiler. Since we don't have all the startup
# files setup yet (that's what we are compiling in libgloss!) we want to
# find a compiler without actually doing a link. So the LIB_AC_PROG_CC
# check is copied from xcc/src/libgloss/acinclude.m4
#-------------------------------------------------------------------------
# LIB_AC_PROG_CC_GNU
#-------------------------------------------------------------------------
AC_DEFUN([LIB_AC_PROG_CC_GNU],
[
AC_CACHE_CHECK(whether we are using GNU C, ac_cv_prog_gcc,
[dnl The semicolon is to pacify NeXT's syntax-checking cpp.
cat > conftest.c <<EOF
#ifdef __GNUC__
yes;
#endif
EOF
if AC_TRY_COMMAND(${CC-cc} -E conftest.c) | egrep yes >/dev/null 2>&1; then
ac_cv_prog_gcc=yes
else
ac_cv_prog_gcc=no
fi
])
])
#-------------------------------------------------------------------------
# LIB_AC_PROG_CC
#-------------------------------------------------------------------------
AC_DEFUN([LIB_AC_PROG_CC],
[
AC_BEFORE([$0],[AC_PROG_CPP])dnl
AC_CHECK_PROG(CC, gcc, gcc)
if test -z "$CC"; then
AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
fi
LIB_AC_PROG_CC_GNU
if test $ac_cv_prog_gcc = yes; then
GCC=yes
dnl Check whether -g works, even if CFLAGS is set, in case the package
dnl plays around with CFLAGS (such as to build both debugging and
dnl normal versions of a library), tasteless as that idea is.
ac_test_CFLAGS="${CFLAGS+set}"
ac_save_CFLAGS="$CFLAGS"
CFLAGS=
_AC_PROG_CC_G
if test "$ac_test_CFLAGS" = set; then
CFLAGS="$ac_save_CFLAGS"
elif test $ac_cv_prog_cc_g = yes; then
CFLAGS="-g -O2"
else
CFLAGS="-O2"
fi
else
GCC=
test "${CFLAGS+set}" = set || CFLAGS="-g"
fi
])
|
