Hi all,
Somebody raised this issue on the OpenWrt telephony issue tracker. When
you cross-compile from inside a buildroot you always need to watch out
that no includes and whatnot from the host system are added. So the
pkg-config files need to be OK to use for cross-compile. For instance we
use a pkg-config script which calls the real pkg-config like this:
pkg-config.real --define-variable=prefix=${STAGING_PREFIX} --define-variable=exec_prefix=${STAGING_PREFIX} --define-variable=bindir=${STAGING_PREFIX}/bin $@
This way we update some variables commonly used in the .pc files.
The default libpjproject.pc file that gets installed contains this:
prefix=/usr
exec_prefix=${prefix}
libdir=/usr/lib
includedir=/usr/include
Name: libpjproject
Description: Multimedia communication library
URL: http://www.pjsip.org
Version: 2.9
Libs: -L${libdir} -lpjsua2 -lpjsua -lpjsip-ua -lpjsip-simple -lpjsip -lpjmedia-codec -lpjmedia -lpjmedia-videodev -lpjmedia-audiodev -lpjmedia -lpjnath -lpjlib-util -lsrtp2 -lpj -lssl -lcrypto -luuid -lm -lrt -lpthread
Cflags: -I${includedir} -I/usr/include -DPJ_AUTOCONF=1 -DPJ_IS_BIG_ENDIAN=1 -DPJ_IS_LITTLE_ENDIAN=0 -fPIC -I/home/sk/tmp/openwrt/staging_dir/target-mips_24kc_musl/usr/include
So it contains a hardcoded libdir and includedir and also adds a
hardcoded -I/usr/include into the CFLAGS.
The attached patch fixes all that for us. I'm wondering if this can be
included upstream? If not that's fine, happy to carry the patch locally.
Kind regards,
Seb
--- a/libpjproject.pc.in
+++ b/libpjproject.pc.in
@@ -2,8 +2,8 @@
prefix=@PREFIX@
exec_prefix=${prefix}
-libdir=@LIBDIR@
-includedir=@INCLUDEDIR@
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
Name: libpjproject
Description: Multimedia communication library
--- a/build.mak.in
+++ b/build.mak.in
@@ -310,8 +310,7 @@ export PJ_LIBXX_FILES := $(APP_LIBXX_FIL
# And here are the variables to use if application is using the
# library from the install location (i.e. --prefix)
export PJ_INSTALL_DIR := @prefix@
-export PJ_INSTALL_INC_DIR := @includedir@
export PJ_INSTALL_LIB_DIR := @libdir@
-export PJ_INSTALL_CFLAGS := -I$(PJ_INSTALL_INC_DIR) -DPJ_AUTOCONF=1 @CFLAGS@
+export PJ_INSTALL_CFLAGS := -DPJ_AUTOCONF=1 @CFLAGS@
export PJ_INSTALL_CXXFLAGS := @CXXFLAGS@ $(PJ_INSTALL_CFLAGS)
export PJ_INSTALL_LDFLAGS := -L$(PJ_INSTALL_LIB_DIR) $(APP_LDLIBS)
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