From: David MacKenzie <djm@djmnet.org>
Date: Fri, 26 Aug 1994 04:59:56 +0000 (+0000)
Subject: CPP safety test
X-Git-Tag: fsf-origin~514
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=84230722a954c957a9cce09b06f2c8e235e6fa55;p=thirdparty%2Fautoconf.git

CPP safety test
---

diff --git a/acspecific.m4 b/acspecific.m4
index 887da666d..93fbcda86 100644
--- a/acspecific.m4
+++ b/acspecific.m4
@@ -182,6 +182,10 @@ AC_DEFUN(AC_PROG_YACC,
 dnl
 AC_DEFUN(AC_PROG_CPP,
 [AC_MSG_CHECKING(how to run the C preprocessor)
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+  CPP=
+fi
 if test -z "$CPP"; then
 AC_CACHE_VAL(ac_cv_prog_CPP,
 [  # This must be in double quotes, not single quotes, because CPP may get
diff --git a/lib/autoconf/specific.m4 b/lib/autoconf/specific.m4
index 887da666d..93fbcda86 100644
--- a/lib/autoconf/specific.m4
+++ b/lib/autoconf/specific.m4
@@ -182,6 +182,10 @@ AC_DEFUN(AC_PROG_YACC,
 dnl
 AC_DEFUN(AC_PROG_CPP,
 [AC_MSG_CHECKING(how to run the C preprocessor)
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+  CPP=
+fi
 if test -z "$CPP"; then
 AC_CACHE_VAL(ac_cv_prog_CPP,
 [  # This must be in double quotes, not single quotes, because CPP may get