packages: Add `native-search-paths' field and honor it.

* guix/packages.scm (<search-path-specification>): New record type.
  (search-path-specification->sexp): New procedure.
  (<package>)[native-search-paths]: New field.
  (package-derivation): Accumulate the search paths, and pass them
  as #:search-paths toe BUILDER.
* guix/build-system/gnu.scm (gnu-build): Add #:search-paths.  Compute
  `implicit-search-paths'.  Pass #:search-paths in BUILDER.
* guix/build-system/perl.scm (perl-build): Add #:search-paths, pass it
  to BUILDER with the search paths of PERL.
* guix/build-system/cmake.scm (cmake-build): Add #:search-paths, pass it
  to BUILDER.
* guix/build-system/trivial.scm (trivial-build): Add #:search-paths,
  ignore it.
* guix/build/gnu-build-system.scm (set-paths): Add #:search-paths.
  Remove explicit settings of CPATH, LIBRARY_PATH, and PKG_CONFIG_PATH.
  Instead, walk SEARCH-PATHS and call `set-path-environment-variable'
  for them.
* guix/build/perl-build-system.scm (perl-build): Remove PERL5LIB setting.
* tests/packages.scm ("search paths"): New test.
* gnu/packages/bootstrap.scm (%bootstrap-guile)[raw]: Add
  #:search-paths.
  (%bootstrap-gcc): Add `native-search-paths' field.
* gnu/packages/perl.scm (perl): Likewise.
* gnu/packages/pkg-config.scm (pkg-config): Likewise.
* gnu/packages/glib.scm (intltool): Remove `arguments'.
* gnu/packages/avahi.scm (avahi): Remove #:phases.

1 files changed, 1 insertions, 13 deletions

diff --git a/gnu/packages/avahi.scm b/gnu/packages/avahi.scm
index f7ce908351..fbdc0e2834 100644
--- a/gnu/packages/avahi.scm
+++ b/gnu/packages/avahi.scm
@@ -48,19 +48,7 @@
                            "--disable-xmltoman"
                            "--enable-tests"
                            "--disable-qt3" "--disable-qt4"
-                           "--disable-gtk" "--disable-gtk3")
-       #:phases (alist-cons-before
-                 'configure 'set-perl-path
-                 (lambda* (#:key inputs #:allow-other-keys)
-                   ;; FIXME: Remove this phase when proper support for search
-                   ;; paths is available.
-                   (let ((xml-parser (assoc-ref inputs
-                                                "intltool/perl-xml-parser")))
-                     (setenv "PERL5LIB"
-                             (string-append xml-parser
-                                            "/lib/perl5/site_perl"))
-                     #t))
-                 %standard-phases)))
+                           "--disable-gtk" "--disable-gtk3")))
     (inputs
      `(("expat" ,expat)
        ("glib" ,glib)