From 13e3570bc9cd43f2a036adb45497c96da65331e0 Mon Sep 17 00:00:00 2001
From: Peter Breitenlohner <peb@mppmu.mpg.de>
Date: Wed, 6 Jan 2010 20:14:53 +0100
Subject: [PATCH] Fix AC_CONFIG_LINKS to generated files when srcdir is
 absolute.

* lib/autoconf/status.m4 (_AC_OUTPUT_LINK): Check $ac_source,
not $srcdir, for being relative or absolute.
* tests/torture.at (AC_CONFIG_LINKS): New test.
(AC_CONFIG_LINKS and identical files): Extend test, avoid some
forks.
Report, patch and testcase example by Peter Breitenlohner.

Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
---
 ChangeLog              | 11 +++++++
 lib/autoconf/status.m4 |  2 +-
 tests/torture.at       | 73 ++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 83 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 2765bda9..d5fc01d4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2010-01-06  Peter Breitenlohner  <peb@mppmu.mpg.de>
+	    Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	Fix AC_CONFIG_LINKS to generated files when srcdir is absolute.
+	* lib/autoconf/status.m4 (_AC_OUTPUT_LINK): Check $ac_source,
+	not $srcdir, for being relative or absolute.
+	* tests/torture.at (AC_CONFIG_LINKS): New test.
+	(AC_CONFIG_LINKS and identical files): Extend test, avoid some
+	forks.
+	Report, patch and testcase example by Peter Breitenlohner.
+
 2010-01-05  Eric Blake  <ebb9@byu.net>
 
 	Improve release automation.
diff --git a/lib/autoconf/status.m4 b/lib/autoconf/status.m4
index 4f4e843f..f74bd347 100644
--- a/lib/autoconf/status.m4
+++ b/lib/autoconf/status.m4
@@ -974,7 +974,7 @@ m4_define([_AC_OUTPUT_LINK],
     rm -f "$ac_file"
 
     # Try a relative symlink, then a hard link, then a copy.
-    case $srcdir in
+    case $ac_source in
     [[\\/$]]* | ?:[[\\/]]* ) ac_rel_source=$ac_source ;;
 	*) ac_rel_source=$ac_top_build_prefix$ac_source ;;
     esac
diff --git a/tests/torture.at b/tests/torture.at
index f00498fb..ceea62c5 100644
--- a/tests/torture.at
+++ b/tests/torture.at
@@ -1160,6 +1160,61 @@ AT_CHECK_CONFIGURE([], 1, ignore, ignore)
 AT_CLEANUP
 
 
+## ----------------- ##
+## AC_CONFIG_LINKS.  ##
+## ----------------- ##
+
+AT_SETUP([AC_CONFIG_LINKS])
+
+AT_DATA([configure.ac],
+[[AC_INIT([config links to config files test], [1.0])
+AC_CONFIG_SRCDIR([sub1/file1.in])
+AC_CONFIG_FILES([sub1/file1 file2])
+AC_CONFIG_LINKS([file1:sub1/file1 sub2/file2:file2])
+AC_OUTPUT
+]])
+
+mkdir sub1
+
+AT_DATA([sub1/file1.in],
+[[/* @configure_input@ */
+#define PACKAGE_STRING "@PACKAGE_STRING@"
+]])
+
+AT_DATA([file2.in],
+[[/* @configure_input@ */
+#define PACKAGE_STRING "@PACKAGE_STRING@"
+]])
+
+mkdir build
+AT_CHECK_AUTOCONF
+cd build
+AT_CHECK([../configure && ../configure], 0, [ignore])
+AT_CHECK([cat sub1/file1 sub2/file2 | grep -c "config links"], 0, [2
+])
+AT_CHECK([../configure && ../configure], 0, [ignore])
+AT_CHECK([cat sub1/file1 sub2/file2 | grep -c "config links"], 0, [2
+])
+cd ..
+rm -rf build
+mkdir build
+cd build
+cwd=`pwd`
+AT_CHECK(["$cwd"/../configure && "$cwd"/../configure], 0, [ignore])
+AT_CHECK([cat sub1/file1 sub2/file2 | grep -c "config links"], 0, [2
+])
+cd ..
+AT_CHECK([./configure && ./configure], 0, [ignore], [stderr])
+AT_CHECK([cat sub1/file1 sub2/file2 | grep -c "config links"], 0, [2
+])
+cwd=`pwd`
+AT_CHECK(["$cwd"/configure && "$cwd"/configure], 0, [ignore], [ignore])
+AT_CHECK([cat sub1/file1 sub2/file2 | grep -c "config links"], 0, [2
+])
+
+AT_CLEANUP
+
+
 ## ------------------------------------- ##
 ## AC_CONFIG_LINKS and identical files.  ##
 ## ------------------------------------- ##
@@ -1182,6 +1237,20 @@ AT_CHECK([../configure $configure_options && ../configure $configure_options],
 AT_CHECK([cat src/s src/t], 0, [file1
 file2
 ])
+
+cd ..
+rm -rf build
+mkdir build
+cd build
+cwd=`pwd`
+AT_CHECK(["$cwd"/../configure], 0, [ignore])
+AT_CHECK([cat src/s src/t], 0, [file1
+file2
+])
+AT_CHECK(["$cwd"/../configure], 0, [ignore])
+AT_CHECK([cat src/s src/t], 0, [file1
+file2
+])
 cd ..
 AT_CHECK([./configure $configure_options && ./configure $configure_options],
 	 0, [ignore], [stderr])
@@ -1189,8 +1258,8 @@ AT_CHECK([grep src/t stderr], 1)
 AT_CHECK([cat src/s src/t], 0, [file1
 file2
 ])
-AT_CHECK(["`pwd`"/configure $configure_options && "`pwd`"/configure $configure_options],
-	 0, [ignore], [ignore])
+cwd=`pwd`
+AT_CHECK(["$cwd"/configure && "$cwd"/configure], 0, [ignore], [ignore])
 AT_CHECK([cat src/s src/t], 0, [file1
 file2
 ])
-- 
2.47.2