45 lines
1.2 KiB
Text
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
|