gnu: fontconfig: Fix build failure caused by symbol conflict with glibc@2.25.

* gnu/packages/patches/fontconfig-charwidth-symbol-conflict.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/fontutils.scm (fontconfig)[source]: Use it.

2 files changed, 83 insertions, 0 deletions

diff --git a/gnu/packages/fontutils.scm b/gnu/packages/fontutils.scm
index fad0cb11ab..ad15659f6e 100644
--- a/gnu/packages/fontutils.scm
+++ b/gnu/packages/fontutils.scm
@@ -229,6 +229,7 @@ fonts to/from the WOFF2 format.")
             (uri (string-append
                    "https://www.freedesktop.org/software/fontconfig/release/fontconfig-"
                    version ".tar.bz2"))
+            (patches (search-patches "fontconfig-charwidth-symbol-conflict.patch"))
             (sha256 (base32
                      "1wy7svvp7df6bjpg1m5vizb3ngd7rhb20vpclv3x3qa71khs6jdl"))))
    (build-system gnu-build-system)
diff --git a/gnu/packages/patches/fontconfig-charwidth-symbol-conflict.patch b/gnu/packages/patches/fontconfig-charwidth-symbol-conflict.patch
new file mode 100644
index 0000000000..8ebe33bc6c
--- /dev/null
+++ b/gnu/packages/patches/fontconfig-charwidth-symbol-conflict.patch
@@ -0,0 +1,82 @@
+The first patch is copied from the upstream source repository:
+
+https://cgit.freedesktop.org/fontconfig/commit/?id=1ab5258f7c2abfafcd63a760ca08bf93591912da
+
+The second patch is adapted from a message to from the OpenEmbedded mailing list:
+
+http://lists.openembedded.org/pipermail/openembedded-core/2016-December/130213.html
+
+From 1ab5258f7c2abfafcd63a760ca08bf93591912da Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 14 Dec 2016 16:11:05 -0800
+Subject: Avoid conflicts with integer width macros from TS 18661-1:2014
+
+glibc 2.25+ has now defined these macros in <limits.h>
+https://sourceware.org/git/?p=glibc.git;a=commit;h=5b17fd0da62bf923cb61d1bb7b08cf2e1f1f9c1a
+
+Create an alias for FC_CHAR_WIDTH for ABI compatibility
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+diff --git a/fontconfig/fontconfig.h b/fontconfig/fontconfig.h
+index 5c72b22..070a557 100644
+--- a/fontconfig/fontconfig.h
++++ b/fontconfig/fontconfig.h
+@@ -128,7 +128,8 @@ typedef int		FcBool;
+ #define FC_USER_CACHE_FILE	    ".fonts.cache-" FC_CACHE_VERSION
+ 
+ /* Adjust outline rasterizer */
+-#define FC_CHAR_WIDTH	    "charwidth"	/* Int */
++#define FC_CHARWIDTH	    "charwidth"	/* Int */
++#define FC_CHAR_WIDTH	    FC_CHARWIDTH
+ #define FC_CHAR_HEIGHT	    "charheight"/* Int */
+ #define FC_MATRIX	    "matrix"    /* FcMatrix */
+ 
+diff --git a/src/fcobjs.h b/src/fcobjs.h
+index 1fc4f65..d27864b 100644
+--- a/src/fcobjs.h
++++ b/src/fcobjs.h
+@@ -51,7 +51,7 @@ FC_OBJECT (DPI,			FcTypeDouble,	NULL)
+ FC_OBJECT (RGBA,		FcTypeInteger,	NULL)
+ FC_OBJECT (SCALE,		FcTypeDouble,	NULL)
+ FC_OBJECT (MINSPACE,		FcTypeBool,	NULL)
+-FC_OBJECT (CHAR_WIDTH,		FcTypeInteger,	NULL)
++FC_OBJECT (CHARWIDTH,		FcTypeInteger,	NULL)
+ FC_OBJECT (CHAR_HEIGHT,		FcTypeInteger,	NULL)
+ FC_OBJECT (MATRIX,		FcTypeMatrix,	NULL)
+ FC_OBJECT (CHARSET,		FcTypeCharSet,	FcCompareCharSet)
+-- 
+cgit v0.10.2
+
+From 20cddc824c6501c2082cac41b162c34cd5fcc530 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem at gmail.com>
+Date: Sun, 11 Dec 2016 14:32:00 -0800
+Subject: [PATCH] Avoid conflicts with integer width macros from TS
+ 18661-1:2014
+
+glibc 2.25+ has now defined these macros in <limits.h>
+https://sourceware.org/git/?p=glibc.git;a=commit;h=5b17fd0da62bf923cb61d1bb7b08cf2e1f1f9c1a
+
+Signed-off-by: Khem Raj <raj.khem at gmail.com>
+---
+Upstream-Status: Submitted
+
+ fontconfig/fontconfig.h | 2 +-
+ src/fcobjs.h            | 2 +-
+ src/fcobjshash.gperf    | 2 +-
+ src/fcobjshash.h        | 2 +-
+ 4 files changed, 4 insertions(+), 4 deletions(-)
+
+Index: fontconfig-2.12.1/src/fcobjshash.h
+===================================================================
+--- fontconfig-2.12.1.orig/src/fcobjshash.h
++++ fontconfig-2.12.1/src/fcobjshash.h
+@@ -284,7 +284,7 @@ FcObjectTypeLookup (register const char
+       {(int)(long)&((struct FcObjectTypeNamePool_t *)0)->FcObjectTypeNamePool_str43,FC_CHARSET_OBJECT},
+       {-1},
+ #line 47 "fcobjshash.gperf"
+-      {(int)(long)&((struct FcObjectTypeNamePool_t *)0)->FcObjectTypeNamePool_str45,FC_CHAR_WIDTH_OBJECT},
++      {(int)(long)&((struct FcObjectTypeNamePool_t *)0)->FcObjectTypeNamePool_str45,FC_CHARWIDTH_OBJECT},
+ #line 48 "fcobjshash.gperf"
+       {(int)(long)&((struct FcObjectTypeNamePool_t *)0)->FcObjectTypeNamePool_str46,FC_CHAR_HEIGHT_OBJECT},
+ #line 55 "fcobjshash.gperf"