[grass] Compile gem/Makefile with -fPIC to fix FTBFS

[Devrim GÜNDÜZ]

commit 504bfced9f022df1098cdd3bd93811be9e2cf4db
Author: Devrim Gündüz <devrim at gunduz.org>
Date:   Thu Mar 19 11:15:53 2015 +0200

    Compile gem/Makefile with -fPIC to fix FTBFS

 0005-gem-makefile.patch | 11 +++++++++++
 grass.spec              |  4 ++++
 2 files changed, 15 insertions(+)
---
diff --git a/0005-gem-makefile.patch b/0005-gem-makefile.patch
new file mode 100644
index 0000000..4d62abf
--- /dev/null
+++ b/0005-gem-makefile.patch
@@ -0,0 +1,11 @@
+--- gem/Makefile.old	2015-03-19 11:05:39.814000000 +0200
++++ gem/Makefile	2015-03-19 11:05:48.276000000 +0200
+@@ -1,7 +1,7 @@
+ GRASS_VERSION_MAJOR=6
+ GRASS_VERSION_MINOR=4
+ CC=gcc
+-CFLAGS=-g -Wall -pedantic -Werror-implicit-function-declaration -fno-common
++CFLAGS=-g -Wall -pedantic -Werror-implicit-function-declaration -fno-common -fPIC
+ CLIBS=
+ 
+ SRCS =  at_exit_funcs.c \
diff --git a/grass.spec b/grass.spec
index f9eaf94..699b614 100644
--- a/grass.spec
+++ b/grass.spec
@@ -42,6 +42,9 @@ Patch2:    0003-grass-docfiles.patch
 # Address -Werror-format-string-security issues.
 Patch3:    0004-Eliminate-Werror-format-string-security-issues.patch
 
+# gem/Makefile overrides CFLAGS
+Patch4:    0005-gem-makefile.patch
+
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 Requires:  proj-nad proj-epsg wxPython
@@ -132,6 +135,7 @@ GRASS (Geographic Resources Analysis Support System) development headers.
 %patch1 -p1
 %patch2 -p1
 %patch3 -p1
+%patch4 -p0
 
 # Correct mysql_config query
 sed -i 's|--libmysqld-libs|--libs|g' configure