libgpg_error: allow header files to be parsed by gcc2. (#2133)

dev-libs/libgpg_error/libgpg_error-1.27.recipe

@@ -5,7 +5,7 @@ DirMngr, Pinentry, SmartCard Daemon and more."
 HOMEPAGE="https://www.gnupg.org/related_software/libraries.en.html#lib-libgpg-error"
 COPYRIGHT="2003-2016 g10 Code GmbH"
 LICENSE="GNU LGPL v2.1"
-REVISION="3"
+REVISION="4"
 SOURCE_URI="https://www.gnupg.org/ftp/gcrypt/libgpg-error/libgpg-error-$portVersion.tar.bz2"
 CHECKSUM_SHA256="4f93aac6fecb7da2b92871bb9ee33032be6a87b174f54abf8ddf0911a22d29d2"
 SOURCE_DIR="libgpg-error-$portVersion"

dev-libs/libgpg_error/patches/libgpg_error-1.27.patchset

@@ -20,3 +20,51 @@ index ea58503..93cfef2 100644
 -- 
 1.8.3.4
 
+
+From 148704497e457b5d82d2d6d4d338f971a273a001 Mon Sep 17 00:00:00 2001
+From: fbrosson <fbrosson@localhost>
+Date: Wed, 17 Jan 2018 22:03:45 +0000
+Subject: Do not use __GNUC_PATCHLEVEL__ if it's not defined.
+
+
+diff --git a/doc/yat2m.c b/doc/yat2m.c
+index 9b76f19..6cda15a 100644
+--- a/doc/yat2m.c
++++ b/doc/yat2m.c
+@@ -105,9 +105,14 @@
+ 
+ 
+ #if __GNUC__
++# ifdef __GNUC_PATCHLEVEL__
+ # define MY_GCC_VERSION (__GNUC__ * 10000 \
+                          + __GNUC_MINOR__ * 100         \
+                          + __GNUC_PATCHLEVEL__)
++# else
++# define MY_GCC_VERSION (__GNUC__ * 10000 \
++                         + __GNUC_MINOR__ * 100)
++# endif
+ #else
+ # define MY_GCC_VERSION 0
+ #endif
+diff --git a/src/gpg-error.h.in b/src/gpg-error.h.in
+index 988898e..222a9b7 100644
+--- a/src/gpg-error.h.in
++++ b/src/gpg-error.h.in
+@@ -142,9 +142,14 @@ typedef unsigned int gpg_error_t;
+ 
+ /* GCC feature test.  */
+ #if __GNUC__
++# ifdef __GNUC_PATCHLEVEL__
+ # define _GPG_ERR_GCC_VERSION (__GNUC__ * 10000 \
+                                + __GNUC_MINOR__ * 100 \
+                                + __GNUC_PATCHLEVEL__)
++# else
++# define _GPG_ERR_GCC_VERSION (__GNUC__ * 10000 \
++                               + __GNUC_MINOR__ * 100)
++# endif
+ #else
+ # define _GPG_ERR_GCC_VERSION 0
+ #endif
+-- 
+2.15.1
+