build: preliminary pkgconf .pc file (WIP)

.gitignore

@@ -31,6 +31,9 @@
 /test-driver
 /test-suite.log
 
+/frr.pc
+/frr-uninstalled.pc
+
 /Makefile
 /Makefile.in
 

Makefile.am

@@ -235,6 +235,9 @@ EXTRA_DIST += \
 	m4/libtool-whole-archive.patch \
 	config.version \
 	\
+	frr.pc.in \
+	frr-uninstalled.pc.in \
+	\
 	python/clidef.py \
 	python/clippy/__init__.py \
 	python/clippy/elf.py \

configure.ac

@@ -668,6 +668,7 @@ fi
 AC_SUBST([AC_LDFLAGS])
 AC_SUBST([AC_LDFLAGS_EXEC])
 AM_CONDITIONAL([STATIC_BIN], [test "$enable_static_bin" = "yes"])
+AC_SUBST([LT_OBJDIR], [$lt_cv_objdir])
 
 dnl libtool, the repository of all knowledge related linkers, is too stupid to
 dnl correctly tell the linker how to build modules.
@@ -1065,6 +1066,7 @@ case "${enable_multipath}" in
 esac
 
 AC_DEFINE_UNQUOTED([MULTIPATH_NUM], [$MPATH_NUM], [Maximum number of paths for a route])
+AC_SUBST([MULTIPATH_NUM], [$MPATH_NUM])
 
 case "${with_log_timestamp_precision}" in
 [[0-9]|1[012]])
@@ -2828,6 +2830,8 @@ AC_CONFIG_FILES([tools/frrinit.sh], [chmod +x tools/frrinit.sh])
 AC_CONFIG_FILES([tools/frrcommon.sh])
 AC_CONFIG_FILES([tools/frr.service])
 AC_CONFIG_FILES([tools/[email protected]])
+AC_CONFIG_FILES([frr.pc])
+AC_CONFIG_FILES([frr-uninstalled.pc])
 
 # dnl write out a ccls file with our compile configuration
 # dnl have to add -Wno-unused-function otherwise foobar_cmd_magic causes

frr-uninstalled.pc.in

@@ -0,0 +1,31 @@
+# 'root of all evil' path references
+#
+abs_top_srcdir="@abs_top_srcdir@"
+abs_top_builddir="@abs_top_builddir@"
+#
+# the following are provided so you can line up installation paths.
+# note you can access them with e.g. "pkgconf --variable=moduledir"
+#
+frr_runstatedir="@e_frr_runstatedir@"
+frr_libstatedir="@e_frr_libstatedir@"
+yangmodelsdir="@e_yangmodelsdir@"
+moduledir="@e_moduledir@"
+scriptdir="@e_scriptdir@"
+frr_sysconfdir="@e_frr_sysconfdir@/"
+vtysh_bin="@e_vtysh_bin@"
+watchfrr_sh="@e_watchfrr_sh@"
+#
+# these are needed to make the build work
+#
+multipath_num="@MULTIPATH_NUM@"
+libdir="@libdir@"
+# FIXME: this is a relative path
+clippy="@CLIPPY@"
+
+Name: @PACKAGE@
+Description: FRRouting non-installed build support
+URL: @PACKAGE_BUGREPORT@
+Version: @PACKAGE_VERSION@
+Libs: -L${libdir} -L${abs_top_builddir}/lib -L${abs_top_builddir}/lib/@LT_OBJDIR@ -Wl,-rpath,${libdir} -lfrr
+Cflags: -I${abs_top_srcdir} -I${abs_top_builddir} -I${abs_top_srcdir}/lib -I${abs_top_builddir}/lib \
+	-fms-extensions -DMULTIPATH_NUM=${multipath_num}

frr.pc.in

@@ -0,0 +1,30 @@
+# when packaging an FRR source/build tree, fill in the next line
+# (e.g. with /usr/src/frr)
+#
+abs_top_treedir="FILL_TREEDIR_DURING_PACKAGING"
+#
+# the following are provided so you can line up installation paths.
+# note you can access them with e.g. "pkgconf --variable=moduledir"
+#
+frr_runstatedir="@e_frr_runstatedir@"
+frr_libstatedir="@e_frr_libstatedir@"
+yangmodelsdir="@e_yangmodelsdir@"
+moduledir="@e_moduledir@"
+scriptdir="@e_scriptdir@"
+frr_sysconfdir="@e_frr_sysconfdir@/"
+vtysh_bin="@e_vtysh_bin@"
+watchfrr_sh="@e_watchfrr_sh@"
+#
+# these are needed to make the build work
+#
+multipath_num="@MULTIPATH_NUM@"
+libdir="@libdir@"
+clippy="${abs_top_treedir}/lib/clippy"
+
+Name: @PACKAGE@
+Description: FRRouting packaged-source-tree build support
+URL: @PACKAGE_BUGREPORT@
+Version: @PACKAGE_VERSION@
+Libs: -L${libdir} -Wl,-rpath,${libdir} -lfrr
+Cflags: -I${abs_top_treedir} -I${abs_top_treedir}/lib \
+	-fms-extensions -DMULTIPATH_NUM=${multipath_num}