old-cross-binutils/bfd/aclocal.m4
1995-09-06 00:02:00 +00:00

45 lines
1.2 KiB
Text

dnl
dnl This ugly hack is needed because the Cygnus configure script won't
dnl tell us what CC is going to be, and "cc" isn't always right. (The
dnl top-level Makefile will always override anything we choose here, so
dnl the usual gcc/cc selection is useless.)
dnl
dnl It knows where it is in the tree; don't try using it elsewhere.
dnl
undefine([AC_PROG_CC])dnl
AC_DEFUN(AC_PROG_CC,
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
dnl
dnl The ugly bit...
dnl
AC_MSG_CHECKING([for CC])
dnl Don't bother with cache.
test -z "$CC" && test -r ../Makefile && CC=`egrep '^CC *=' ../Makefile | tail -1 | sed 's/^CC *= *//'`
test -z "$CC" && CC=cc
AC_MSG_RESULT(setting CC to $CC)
AC_SUBST(CC)
dnl
dnl Find out if we are using GNU C, under whatever name.
dnl The semicolon is to pacify NeXT's syntax-checking cpp.
cat > conftest.c <<EOF
#ifdef __GNUC__
yes;
#endif
EOF
if ${CC-cc} -E conftest.c 2>&AC_FD_CC | egrep yes >/dev/null 2>&1; then
GCC=yes
if test "${CFLAGS+set}" != set; then
echo 'void f(){}' > conftest.c
if test -z "`${CC-cc} -g -c conftest.c 2>&1`"; then
CFLAGS="-g -O"
else
CFLAGS="-O"
fi
fi
else
GCC=
test "${CFLAGS+set}" = set || CFLAGS="-g"
fi
rm -f conftest*
])dnl
dnl