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-rw-r--r--gnu/packages/pkg-config.scm53
1 files changed, 51 insertions, 2 deletions
diff --git a/gnu/packages/pkg-config.scm b/gnu/packages/pkg-config.scm
index 294163b474..9f10440fec 100644
--- a/gnu/packages/pkg-config.scm
+++ b/gnu/packages/pkg-config.scm
@@ -20,9 +20,11 @@
#:use-module (guix licenses)
#:use-module (guix packages)
#:use-module (guix download)
- #:use-module (guix build-system gnu))
+ #:use-module (guix build-system gnu)
+ #:use-module (guix build-system trivial)
+ #:export (pkg-config))
-(define-public pkg-config
+(define %pkg-config
(package
(name "pkg-config")
(version "0.27.1")
@@ -53,3 +55,50 @@ command line so an application can use gcc -o test test.c `pkg-config
on where to find glib (or other libraries). It is language-agnostic, so
it can be used for defining the location of documentation tools, for
instance.")))
+
+(define (cross-pkg-config target)
+ "Return a pkg-config for TARGET, essentially just a wrapper called
+`TARGET-pkg-config', as `configure' scripts like it."
+ ;; See <http://www.flameeyes.eu/autotools-mythbuster/pkgconfig/cross-compiling.html>
+ ;; for details.
+ (package (inherit %pkg-config)
+ (name (string-append (package-name %pkg-config) "-" target))
+ (build-system trivial-build-system)
+ (arguments
+ `(#:modules ((guix build utils))
+ #:builder (begin
+ (use-modules (guix build utils))
+
+ (let* ((out (assoc-ref %outputs "out"))
+ (bin (string-append out "/bin"))
+ (prog (string-append ,target "-pkg-config"))
+ (native
+ (string-append
+ (assoc-ref %build-inputs "pkg-config")
+ "/bin/pkg-config")))
+
+ (mkdir-p bin)
+
+ ;; Create a `TARGET-pkg-config' -> `pkg-config' symlink.
+ ;; This satisfies the pkg.m4 macros, which use
+ ;; AC_PROG_TOOL to determine the `pkg-config' program
+ ;; name.
+ (symlink native (string-append bin "/" prog))))))
+ (native-inputs `(("pkg-config" ,%pkg-config)))
+
+ ;; Ignore native inputs, and set `PKG_CONFIG_PATH' for target inputs.
+ (native-search-paths '())
+ (search-paths (package-native-search-paths %pkg-config))))
+
+(define (pkg-config-for-target target)
+ "Return a pkg-config package for TARGET, which may be either #f for a native
+build, or a GNU triplet."
+ (if target
+ (cross-pkg-config target)
+ %pkg-config))
+
+;; This hack allows us to automatically choose the native or the cross
+;; `pkg-config' depending on whether it's being used in a cross-build
+;; environment or not.
+(define-syntax pkg-config
+ (identifier-syntax (pkg-config-for-target (%current-target-system))))