Create pkg-config macro library

svn path=/trunk/tools/buildsystem/; revision=10966

2 files changed, 74 insertions, 0 deletions

diff --git a/makefiles/Makefile.pkgconfig b/makefiles/Makefile.pkgconfig
new file mode 100644
index 0000000..9e0e75d
--- /dev/null
+++ b/makefiles/Makefile.pkgconfig
@@ -0,0 +1,69 @@
+# General purpose pkg-config macros
+
+# Determine if a package is available
+# 1: Name of variable to assign result into
+# 2: Name of package to search for
+define pkg_config_package_available
+  ifeq ($$(PKGCONFIG),)
+    $$(error pkg-config is required to auto-detect package availability)
+  endif
+
+  ifeq ($$(shell $$(PKGCONFIG) --exists $(2) && echo yes),yes)
+    $(1) := yes
+  else
+    $(1) := no
+  endif
+
+endef
+
+# Retrieve the version of a package
+# 1: Name of variable to assign result into
+# 2: Name of package to search for
+define pkg_config_package_version
+  ifeq ($$(PKGCONFIG),)
+    $$(error pkg-config is required to auto-detect package version)
+  endif
+
+  $(1) := $$(shell $$(PKGCONFIG) --version $(2))
+
+endef
+
+# Test the presence of a minimum version of a package
+# 1: Name of variable to assign result into
+# 2: Name of package to search for
+# 3: Lowest accepted version number
+define pkg_config_package_min_version
+  ifeq ($$(PKGCONFIG),)
+    $$(error pkg-config is required to auto-detect package version)
+  endif
+
+  ifeq ($$(shell $$(PKGCONFIG) --atleast-version=$(3) $(2) && echo yes),yes)
+     $(1) := yes
+  else
+     $(1) := no
+  endif
+
+endef
+
+# Test the presence of a minimum version of a package
+# 1: Name of variable to assign result into
+# 2: Name of package to search for
+# 3: Lowest accepted version number
+# 4: Highest accepted version number
+define pkg_config_package_compare_version
+  ifeq ($$(PKGCONFIG),)
+    $$(error pkg-config is required to auto-detect package version)
+  endif
+
+  ifeq ($$(shell $$(PKGCONFIG) --atleast-version=$(3) $(2) && echo yes),yes)
+     ifeq ($$(shell $$(PKGCONFIG) --max-version=$(4) $(2) && echo yes),yes)
+       $(1) := yes
+     else
+       $(1) := no
+     endif
+  else
+     $(1) := no
+  endif
+
+endef
+
diff --git a/makefiles/Makefile.tools b/makefiles/Makefile.tools
index 4cf2fb1..aff1c23 100644
--- a/makefiles/Makefile.tools
+++ b/makefiles/Makefile.tools
@@ -372,3 +372,8 @@ ifeq ($(COMPONENT_TYPE),lib-shared)
   SHAREDLDPATH ?= LD_LIBRARY_PATH="$(BUILDDIR):$(LD_LIBRARY_PATH)"
 endif
 
+################################################################################
+# Package config macros
+################################################################################
+
+include build/makefiles/Makefile.pkgconfig