enable optional inline dependency build

configure.ac

@@ -22,6 +22,8 @@ NC_OPTIMISATION
 NC_WARNINGS
 NC_DEBUGGING
 
+NC_SUBPACKAGE_ENABLE
+
 LT_INIT
 
 AM_INIT_AUTOMAKE([1.14 dist-bzip2 dist-xz foreign subdir-objects])
@@ -104,10 +106,11 @@ AC_SUBST(LIBS)
 # failure on a clean build
 AX_APPEND_FLAG([-include config.h])
 
+NC_SUBPACKAGE_PC([libcruft-util.pc])
+
 AC_CONFIG_FILES([
     Doxyfile
     Makefile
-    libcruft-util.pc
 ])
 
 AC_CONFIG_FILES([test/json-parse],  [chmod a+x test/json-parse])

libcruft-util-inline.pc.in

@@ -0,0 +1,6 @@
+Name: libcruft-util
+Description: A simple utility library in C++
+URL: http://nerdcruft.net/
+Version: @VERSION@
+Libs: @abs_top_builddir@/libcruft-util.a @BOOST_LDFLAGS@ @LIBS@
+Cflags: -isystem @abs_top_builddir@/fake @BOOST_CPPFLAGS@

libcruft-util.pc.in

@@ -7,5 +7,5 @@ Name: libcruft-util
 Description: A simple utility library in C++
 URL: http://nerdcruft.net/
 Version: @VERSION@
-Libs: -L${libdir} -lcruft-util @BOOST_LDFLAGS@ @BOOST_FILESYSTEM_LIB@ @BOOST_SYSTEM_LIB@ -lrt
-Cflags: -I${includedir}/cruft @BOOST_CPPFLAGS@
+Libs: -L${libdir} -lcruft-util @BOOST_LDFLAGS@ @LIBS@
+Cflags: -I${includedir} @BOOST_CPPFLAGS@

m4/nc_subpackage.m4

@@ -0,0 +1,33 @@
+AC_DEFUN([NC_SUBPACKAGE_PC], [
+    base=`basename $1 .pc`
+    AC_CONFIG_FILES([$1:$base$nc_cv_config_pc_postfix.pc.in])
+])
+
+
+AC_DEFUN([NC_SUBPACKAGE_ENABLE],[
+    AC_ARG_ENABLE([inline], [AS_HELP_STRING([--enable-inline], [enable building for use as an inline dependency])])
+
+    AS_IF([test "x$enable_inline" == "xyes"], [
+        AC_PROG_LN_S
+
+        AC_CACHE_VAL([nc_cv_config_pc_postfix], [nc_cv_config_pc_postfix='-inline'])
+
+        AC_CONFIG_COMMANDS([fake/cruft], [
+            dnl make a fake include directory which looks like the typical
+            dnl installation prefix. we should probably use AC_CONFIG_LINKS
+            dnl but i'm not proficient enough at m4 to process the globs
+            dnl correctly.
+
+            AS_ECHO(["fake/cruft/$cruft_base"])
+            AS_MKDIR_P(["fake/cruft"])
+            $LN_S -nf "$ac_abs_top_srcdir" "fake/cruft/$cruft_base"
+
+            AS_IF([test ! -L "fake/cruft/$cruft_base"], [
+                AC_MSG_ERROR([could not create inline include directory])
+            ])
+        ], [
+            cruft_base=`echo "${PACKAGE_NAME}" | sed 's/-.*//'`
+        ])
+    ])
+])
+