[gnome-continuous] Enforce the C compiler for json-glib

[Emmanuele Bassi <ebassi src gnome org>]

commit c8ea85323b8fa768b9c948b29d103a0028d331c1
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sat Mar 18 17:30:23 2017 +0000

    Enforce the C compiler for json-glib
    
    Otherwise CCache will be detected and will try to create a cache
    directory under the wrong prefix.

 manifest.json                    |    3 ++-
 patches/json-glib-compiler.patch |   37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index cfe673f..07c3431 100644
--- a/manifest.json
+++ b/manifest.json
@@ -680,7 +680,8 @@
                {"src": "gnome:gnome-keyring",
                 "config-opts": ["--disable-doc"]},
 
-               {"src": "gnome:json-glib"},
+               {"src": "gnome:json-glib",
+                 "patches": ["json-glib-compiler.patch"]},
 
                {"src": "gnome:libcroco"},
 
diff --git a/patches/json-glib-compiler.patch b/patches/json-glib-compiler.patch
new file mode 100644
index 0000000..77a8fbb
--- /dev/null
+++ b/patches/json-glib-compiler.patch
@@ -0,0 +1,37 @@
+From ba3476844ac99f690ed0a6b8f52049f2218880e1 Mon Sep 17 00:00:00 2001
+From: Emmanuele Bassi <ebassi gnome org>
+Date: Sat, 18 Mar 2017 17:28:49 +0000
+Subject: [PATCH] Enforce gcc as the compiler
+
+Otherwise Continuous will attempt to use ccache with a read-only file
+system:
+
+ccache: error: Failed to create directory //.ccache/tmp: Read-only file system
+---
+ configure | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/configure b/configure
+index b2a0754..cdc436d 100755
+--- a/configure
++++ b/configure
+@@ -103,7 +103,7 @@ cat > Makefile <<END
+ # Generated by configure; do not edit
+ 
+ all:
+-      CC="\$(CC)" CXX="\$(CXX)" ${NINJA}
++      CC="gcc" ${NINJA}
+ 
+ install:
+       DESTDIR="\$(DESTDIR)" ${NINJA} install
+@@ -125,6 +125,7 @@ echo "  includedir:.. ${includedir}"
+ echo "  additional:.."
+ echo "    - ${enable_docs} ${enable_man} ${enable_introspection}"
+ 
++export CC=gcc
+ exec ${MESON} \
+       --prefix=${prefix} \
+       --libdir=${libdir} \
+-- 
+2.9.3
+