X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;ds=sidebyside;f=libiberty%2Faclocal.m4;h=c5628352773e78e48710751e8d9f4b2eec91b12f;hb=d1209685fa061309f5f7ad73eb4fb5ef30b402d0;hp=b6c611e132d018f0e9dac75e5a9a4482ff24336e;hpb=3b58c09931cc776c30aef89f0bac7f6fdca34aca;p=gcc.git

diff --git a/libiberty/aclocal.m4 b/libiberty/aclocal.m4
index b6c611e132d..c5628352773 100644
--- a/libiberty/aclocal.m4
+++ b/libiberty/aclocal.m4
@@ -83,3 +83,54 @@ then AC_DEFINE(NEED_DECLARATION_ERRNO, 1,
   [Define if errno must be declared even when <errno.h> is included.])
 fi
 ])
+
+# FIXME: We temporarily define our own version of AC_PROG_CC.  This is
+# copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We
+# are probably using a cross compiler, which will not be able to fully
+# link an executable.  This should really be fixed in autoconf
+# itself.
+
+AC_DEFUN(LIB_AC_PROG_CC,
+[AC_BEFORE([$0], [AC_PROG_CPP])dnl
+AC_PROVIDE([AC_PROG_CC])
+AC_CHECK_PROG(CC, gcc, gcc)
+if test -z "$CC"; then
+  AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
+  test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
+fi
+
+AC_PROG_CC_GNU
+
+if test $ac_cv_prog_gcc = yes; then
+  GCC=yes
+  ac_libiberty_warn_cflags='-W -Wall -Wtraditional -pedantic'
+dnl Check whether -g works, even if CFLAGS is set, in case the package
+dnl plays around with CFLAGS (such as to build both debugging and
+dnl normal versions of a library), tasteless as that idea is.
+  ac_test_CFLAGS="${CFLAGS+set}"
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS=
+  AC_PROG_CC_G
+  if test "$ac_test_CFLAGS" = set; then
+    CFLAGS="$ac_save_CFLAGS"
+  elif test $ac_cv_prog_cc_g = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-O2"
+  fi
+else
+  GCC=
+  ac_libiberty_warn_cflags=
+  test "${CFLAGS+set}" = set || CFLAGS="-g"
+fi
+AC_SUBST(ac_libiberty_warn_cflags)
+])
+
+# Work around a bug in autoheader.  This can go away when we switch to
+# autoconf >2.50.  The use of define instead of AC_DEFUN is
+# deliberate.
+define(AC_DEFINE_NOAUTOHEADER,
+[cat >> confdefs.h <<\EOF
+[#define] $1 ifelse($#, 2, [$2], $#, 3, [$2], 1)
+EOF
+])