From e321b9eee734cfb0fc583f1d41d6566ad2187238 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 5 Apr 2016 11:11:59 +1000
Subject: [PATCH] enable optional inline dependency build

---
 configure.ac               |  5 ++++-
 libcruft-util-inline.pc.in |  6 ++++++
 libcruft-util.pc.in        |  4 ++--
 m4/nc_subpackage.m4        | 33 +++++++++++++++++++++++++++++++++
 4 files changed, 45 insertions(+), 3 deletions(-)
 create mode 100644 libcruft-util-inline.pc.in
 create mode 100644 m4/nc_subpackage.m4

diff --git a/configure.ac b/configure.ac
index f0f12de0..003f2b0c 100644
--- a/configure.ac
+++ b/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])
diff --git a/libcruft-util-inline.pc.in b/libcruft-util-inline.pc.in
new file mode 100644
index 00000000..58f2a0d9
--- /dev/null
+++ b/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@
diff --git a/libcruft-util.pc.in b/libcruft-util.pc.in
index 819459f5..13d07bdc 100644
--- a/libcruft-util.pc.in
+++ b/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@
diff --git a/m4/nc_subpackage.m4 b/m4/nc_subpackage.m4
new file mode 100644
index 00000000..b0c99cd3
--- /dev/null
+++ b/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/-.*//'`
+        ])
+    ])
+])
+