From: Ross Burton <ross.burton@arm.com>
Date: Thu, 26 Feb 2026 14:31:10 +0000 (+0000)
Subject: classes/pkgconfig: rationalise variable usage
X-Git-Tag: uninative-5.1~129
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=52c7dbb1d4f28cc8d51c2129b93775ded0d3ef31;p=thirdparty%2Fopenembedded%2Fopenembedded-core.git

classes/pkgconfig: rationalise variable usage

Our PKG_CONFIG_* variables were a bit of a mess.

First, PKG_CONFIG_DIR is not used by either pkg-config or pkgconf.  It's
set to (approximately) ${libdir}/pkgconfig but we also want to search
${datadir}/pkgconfig so it isn't actually useful as an intermediate
variable.

Remove PKG_CONFIG_DIR and replace with the neatest expression for the
value we want: ${STAGING_LIBDIR}/pkgconfig.

Second, PKG_CONFIG_PATH and PKG_CONFIG_LIBDIR shouldn't be set to the
same paths. The semantics of these variables is that PKG_CONFIG_PATH is
searched first, followed by either PKG_CONFIG_LIBDIR or the default paths
compiled into the pkg-config binary.

Currently we set PKG_CONFIG_PATH to (approx.) ${libdir}:${datadir} and
PKG_CONFIG_LIBDIR to ${libdir}, so we search libdir twice.

Also the default paths embedded in the binary will be incorrect as they
point to pkgconfig-native's sysroot, so we absolutely need to set
PKG_CONFIG_LIBDIR.

Instead, set PKG_CONFIG_LIBDIR to ${libdir}:${datadir} so that the
default search path is correct. We can then leave PKG_CONFIG_PATH empty,
if a recipe has specific needs it can set that but normally it is not
needed anymore.

Then bubble these changes out to the few places where the variables are
used directly:

- Kernel/kconfig interaction where 'pkg-config' needs to read the
native files, not target.

- The class classes (native, etc) which redefine the values.  However,
as the values are defined in terms of sysroot variables, we can
typically remove assignments from those classes as they are redundant.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---

diff --git a/meta/classes-recipe/cml1.bbclass b/meta/classes-recipe/cml1.bbclass
index 3c2b4da4af..ac65eec4bf 100644
--- a/meta/classes-recipe/cml1.bbclass
+++ b/meta/classes-recipe/cml1.bbclass
@@ -51,12 +51,11 @@ python do_menuconfig() {
         mtime = 0
 
     # setup native pkg-config variables (kconfig scripts call pkg-config directly, cannot generically be overriden to pkg-config-native)
-    d.setVar("PKG_CONFIG_DIR", "${STAGING_DIR_NATIVE}${libdir_native}/pkgconfig")
-    d.setVar("PKG_CONFIG_PATH", "${PKG_CONFIG_DIR}:${STAGING_DATADIR_NATIVE}/pkgconfig")
-    d.setVar("PKG_CONFIG_LIBDIR", "${PKG_CONFIG_DIR}")
+    d.setVar("PKG_CONFIG_PATH", "")
+    d.setVar("PKG_CONFIG_LIBDIR", "${STAGING_LIBDIR_NATIVE}/pkgconfig:${STAGING_DATADIR_NATIVE}/pkgconfig")
     d.setVarFlag("PKG_CONFIG_SYSROOT_DIR", "unexport", "1")
     # ensure that environment variables are overwritten with this tasks 'd' values
-    d.appendVar("OE_TERMINAL_EXPORTS", " PKG_CONFIG_DIR PKG_CONFIG_PATH PKG_CONFIG_LIBDIR PKG_CONFIG_SYSROOT_DIR")
+    d.appendVar("OE_TERMINAL_EXPORTS", " PKG_CONFIG_PATH PKG_CONFIG_LIBDIR PKG_CONFIG_SYSROOT_DIR")
 
     oe_terminal("sh -c 'make %s; if [ $? -ne 0 ]; then echo \"Command failed.\"; printf \"Press any key to continue... \"; read r; fi'" % d.getVar('KCONFIG_CONFIG_COMMAND'),
                 d.getVar('PN') + ' Configuration', d)
diff --git a/meta/classes-recipe/cross-canadian.bbclass b/meta/classes-recipe/cross-canadian.bbclass
index 059d9aa95f..6d3d2f7623 100644
--- a/meta/classes-recipe/cross-canadian.bbclass
+++ b/meta/classes-recipe/cross-canadian.bbclass
@@ -161,8 +161,7 @@ libexecdir = "${exec_prefix}/libexec/${TARGET_ARCH}${TARGET_VENDOR}-${TARGET_OS}
 
 FILES:${PN} = "${prefix}"
 
-export PKG_CONFIG_DIR = "${STAGING_DIR_HOST}${exec_prefix}/lib/pkgconfig"
-export PKG_CONFIG_SYSROOT_DIR = "${STAGING_DIR_HOST}"
+PKG_CONFIG_LIBDIR = "${STAGING_DIR_HOST}${exec_prefix}/lib/pkgconfig:${STAGING_DIR_HOST}${exec_prefix}/share/pkgconfig"
 
 do_populate_sysroot[stamp-extra-info] = ""
 do_packagedata[stamp-extra-info] = ""
diff --git a/meta/classes-recipe/cross.bbclass b/meta/classes-recipe/cross.bbclass
index 574ce6988d..82a49dc8f5 100644
--- a/meta/classes-recipe/cross.bbclass
+++ b/meta/classes-recipe/cross.bbclass
@@ -33,8 +33,8 @@ PACKAGE_ARCH = "${BUILD_ARCH}"
 
 MULTIMACH_TARGET_SYS = "${BUILD_ARCH}${BUILD_VENDOR}-${BUILD_OS}"
 
-export PKG_CONFIG_DIR = "${exec_prefix}/lib/pkgconfig"
-export PKG_CONFIG_SYSROOT_DIR = ""
+PKG_CONFIG_LIBDIR = "${exec_prefix}/lib/pkgconfig:${exec_prefix}/share/pkgconfig"
+PKG_CONFIG_SYSROOT_DIR = ""
 
 TARGET_CPPFLAGS = ""
 TARGET_CFLAGS = ""
diff --git a/meta/classes-recipe/kernel.bbclass b/meta/classes-recipe/kernel.bbclass
index 22568d6e9c..6f4d84c286 100644
--- a/meta/classes-recipe/kernel.bbclass
+++ b/meta/classes-recipe/kernel.bbclass
@@ -358,9 +358,7 @@ kernel_do_compile() {
 	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
 
 	# setup native pkg-config variables (kconfig scripts call pkg-config directly, cannot generically be overriden to pkg-config-native)
-	export PKG_CONFIG_DIR="${STAGING_DIR_NATIVE}${libdir_native}/pkgconfig"
-	export PKG_CONFIG_PATH="$PKG_CONFIG_DIR:${STAGING_DATADIR_NATIVE}/pkgconfig"
-	export PKG_CONFIG_LIBDIR="$PKG_CONFIG_DIR"
+	export PKG_CONFIG_LIBDIR="${STAGING_LIBDIR_NATIVE}/pkgconfig:${STAGING_DATADIR_NATIVE}/pkgconfig"
 	export PKG_CONFIG_SYSROOT_DIR=""
 
 	if [ "${KERNEL_DEBUG_TIMESTAMPS}" != "1" ]; then
@@ -414,9 +412,7 @@ do_compile_kernelmodules() {
 	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
 
 	# setup native pkg-config variables (kconfig scripts call pkg-config directly, cannot generically be overriden to pkg-config-native)
-	export PKG_CONFIG_DIR="${STAGING_DIR_NATIVE}${libdir_native}/pkgconfig"
-	export PKG_CONFIG_PATH="$PKG_CONFIG_DIR:${STAGING_DATADIR_NATIVE}/pkgconfig"
-	export PKG_CONFIG_LIBDIR="$PKG_CONFIG_DIR"
+	export PKG_CONFIG_LIBDIR="${STAGING_LIBDIR_NATIVE}/pkgconfig:${STAGING_DATADIR_NATIVE}/pkgconfig"
 	export PKG_CONFIG_SYSROOT_DIR=""
 
 	if [ "${KERNEL_DEBUG_TIMESTAMPS}" != "1" ]; then
diff --git a/meta/classes-recipe/native.bbclass b/meta/classes-recipe/native.bbclass
index 65b5b97c69..5aa9c8e414 100644
--- a/meta/classes-recipe/native.bbclass
+++ b/meta/classes-recipe/native.bbclass
@@ -98,7 +98,6 @@ do_populate_sysroot[sstate-outputdirs] = "${COMPONENTS_DIR}/${PACKAGE_ARCH}/${PN
 # Since we actually install these into situ there is no staging prefix
 STAGING_DIR_HOST = ""
 STAGING_DIR_TARGET = ""
-PKG_CONFIG_DIR = "${libdir}/pkgconfig"
 
 EXTRA_NATIVE_PKGCONFIG_PATH ?= ""
 PKG_CONFIG_PATH .= "${EXTRA_NATIVE_PKGCONFIG_PATH}"
diff --git a/meta/classes-recipe/nativesdk.bbclass b/meta/classes-recipe/nativesdk.bbclass
index 4404a18856..5adb7515bf 100644
--- a/meta/classes-recipe/nativesdk.bbclass
+++ b/meta/classes-recipe/nativesdk.bbclass
@@ -73,9 +73,6 @@ exec_prefix = "${SDKPATHNATIVE}${prefix_nativesdk}"
 baselib = "lib"
 sbindir = "${bindir}"
 
-export PKG_CONFIG_DIR = "${STAGING_DIR_HOST}${libdir}/pkgconfig"
-export PKG_CONFIG_SYSROOT_DIR = "${STAGING_DIR_HOST}"
-
 python nativesdk_virtclass_handler () {
     pn = e.data.getVar("PN")
     if not (pn.endswith("-nativesdk") or pn.startswith("nativesdk-")):
diff --git a/meta/classes-recipe/pkgconfig.bbclass b/meta/classes-recipe/pkgconfig.bbclass
index 98b6342013..c0d91393b3 100644
--- a/meta/classes-recipe/pkgconfig.bbclass
+++ b/meta/classes-recipe/pkgconfig.bbclass
@@ -6,10 +6,11 @@
 
 DEPENDS:prepend = "pkgconfig-native "
 
-export PKG_CONFIG_DIR ?= "${STAGING_DIR_HOST}${libdir}/pkgconfig"
-export PKG_CONFIG_PATH ?= "${PKG_CONFIG_DIR}:${STAGING_DATADIR}/pkgconfig"
-export PKG_CONFIG_LIBDIR ?= "${PKG_CONFIG_DIR}"
+export PKG_CONFIG_PATH ?= ""
+export PKG_CONFIG_LIBDIR ?= "${STAGING_LIBDIR}/pkgconfig:${STAGING_DATADIR}/pkgconfig"
+
 export PKG_CONFIG_SYSROOT_DIR ?= "${STAGING_DIR_HOST}"
 export PKG_CONFIG_DISABLE_UNINSTALLED ?= "yes"
+
 export PKG_CONFIG_SYSTEM_LIBRARY_PATH ?= "${base_libdir}:${libdir}"
 export PKG_CONFIG_SYSTEM_INCLUDE_PATH ?= "${includedir}"
diff --git a/meta/recipes-kernel/linux/linux-yocto.inc b/meta/recipes-kernel/linux/linux-yocto.inc
index 4d0a726bb6..d57c1aae25 100644
--- a/meta/recipes-kernel/linux/linux-yocto.inc
+++ b/meta/recipes-kernel/linux/linux-yocto.inc
@@ -89,9 +89,8 @@ EXTRA_OEMAKE += '${@bb.utils.contains("KERNEL_DEBUG", "True", "", "PAHOLE=false"
 
 do_devshell:prepend() {
     # setup native pkg-config variables (kconfig scripts call pkg-config directly, cannot generically be overriden to pkg-config-native)
-    d.setVar("PKG_CONFIG_DIR", "${STAGING_DIR_NATIVE}${libdir_native}/pkgconfig")
-    d.setVar("PKG_CONFIG_PATH", "${PKG_CONFIG_DIR}:${STAGING_DATADIR_NATIVE}/pkgconfig")
-    d.setVar("PKG_CONFIG_LIBDIR", "${PKG_CONFIG_DIR}")
+    d.setVar("PKG_CONFIG_PATH", "")
+    d.setVar("PKG_CONFIG_LIBDIR", "${STAGING_LIBDIR_NATIVE}/pkgconfig:${STAGING_DATADIR_NATIVE}/pkgconfig")
     d.setVarFlag("PKG_CONFIG_SYSROOT_DIR", "unexport", "1")
-    d.appendVar("OE_TERMINAL_EXPORTS", " PKG_CONFIG_DIR PKG_CONFIG_PATH PKG_CONFIG_LIBDIR PKG_CONFIG_SYSROOT_DIR")
+    d.appendVar("OE_TERMINAL_EXPORTS", " PKG_CONFIG_PATH PKG_CONFIG_LIBDIR PKG_CONFIG_SYSROOT_DIR")
 }