[PATCH 1/6] gnu: gobject-introspection: look for 'gcc' when no compiler seems available.

[Cyril Roelandt]

* gnu/packages/patches/gobject-introspection.patch: New file.
---
 gnu-system.am                                       |  1 +
 gnu/packages/glib.scm                               |  7 ++++---
 gnu/packages/patches/gobject-introspection-cc.patch | 15 +++++++++++++++
 3 files changed, 20 insertions(+), 3 deletions(-)
 create mode 100644 gnu/packages/patches/gobject-introspection-cc.patch

diff --git a/gnu-system.am b/gnu-system.am
index 2a0a88f..5533143 100644
--- a/gnu-system.am
+++ b/gnu-system.am
@@ -239,6 +239,7 @@ dist_patch_DATA =                                           
\
   gnu/packages/patches/glibc-bootstrap-system.patch            \
   gnu/packages/patches/glibc-ldd-x86_64.patch                  \
   gnu/packages/patches/glibc-make-4.0.patch                    \
+  gnu/packages/patches/gobject-introspection-cc.patch          \
   gnu/packages/patches/grub-gets-undeclared.patch              \
   gnu/packages/patches/gstreamer-0.10-bison3.patch             \
   gnu/packages/patches/gstreamer-0.10-silly-test.patch         \
diff --git a/gnu/packages/glib.scm b/gnu/packages/glib.scm
index fc65f30..1ff873d 100644
--- a/gnu/packages/glib.scm
+++ b/gnu/packages/glib.scm
@@ -176,7 +176,8 @@ dynamic loading, and an object system.")
                    "/gobject-introspection-"
                    version ".tar.xz"))
              (sha256
-              (base32 
"0wvxyvgajmms2bb6k3pf1rdpnd79xdxamykzvxzmcyn1ag9yax9m"))))
+              (base32 "0wvxyvgajmms2bb6k3pf1rdpnd79xdxamykzvxzmcyn1ag9yax9m"))
+             (patches (list (search-patch "gobject-introspection-cc.patch")))))
     (build-system gnu-build-system)
     (inputs
      `(("bison" ,bison)
@@ -192,8 +193,8 @@ dynamic loading, and an object system.")
          'configure
          (lambda* (#:key #:allow-other-keys #:rest args)
           (let ((configure (assoc-ref %standard-phases 'configure)))
-           ;; giscanner/sourcescanner.py looks for 'CC', let's set it here.
-           (setenv "CC" "gcc")
+           (substitute* "giscanner/sourcescanner.py"
+             (("GUIX_GCC_PATH") (which "gcc")))
            (apply configure args)))
          %standard-phases)))
     (home-page "https://wiki.gnome.org/GObjectIntrospection";)
diff --git a/gnu/packages/patches/gobject-introspection-cc.patch 
b/gnu/packages/patches/gobject-introspection-cc.patch
new file mode 100644
index 0000000..280c5d3
--- /dev/null
+++ b/gnu/packages/patches/gobject-introspection-cc.patch
@@ -0,0 +1,15 @@
+Try $CC, 'cc', and finally 'gcc'.
+--- a/giscanner/sourcescanner.py.orig  2013-10-16 03:41:25.381719000 +0200
++++ b/giscanner/sourcescanner.py       2013-10-16 03:43:35.533719000 +0200
+@@ -277,6 +277,11 @@
+         defines = ['__GI_SCANNER__']
+         undefs = []
+         cpp_args = os.environ.get('CC', 'cc').split()  # support CC="ccache 
gcc"
++        if (cpp_args == ['cc'] and
++            not any(map(lambda x: os.access(os.path.join(x, 'cc'), os.X_OK),
++                        os.environ.get('PATH')))):
++            cpp_args = ['GUIX_GCC_PATH']
++
+         if 'cl' in cpp_args:
+             # The Microsoft compiler/preprocessor (cl) does not accept
+             # source input from stdin (the '-' flag), so we need
-- 
1.8.4.rc3