[epiphany] Use introspection.m4 file to detect introspection support

[Xan Lopez <xan src gnome org>]

commit 5ed79e7e20e53a2aa2e3ace40ebbb13584c09f2a
Author: Xan Lopez <xan gnome org>
Date:   Fri Dec 25 18:55:48 2009 +0100

    Use introspection.m4 file to detect introspection support

 configure.ac        |   40 ++++------------------
 m4/introspection.m4 |   94 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/Makefile.am     |   14 ++++----
 3 files changed, 108 insertions(+), 40 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f93880c..13423f0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -215,40 +215,14 @@ EPIPHANY_FEATURES=
 # GObject Introspection
 # *********************
 
-AC_MSG_CHECKING([whether to enable GObject introspection support])
-AC_ARG_ENABLE([introspection],
-  [AS_HELP_STRING([--enable-introspection],[Enable GObject introspection (default: disabled)])],
-  [],[enable_introspection=no])
-AC_MSG_RESULT([$enable_introspection])
-
-G_IR_SCANNER=
-G_IR_COMPILER=
-G_IR_GENERATE=
-GIRDIR=
-GIRTYPELIBDIR=
-
-if test "$enable_introspection" = "yes"; then
-  EPIPHANY_FEATURES="$EPIPHANY_FEATURES introspection"
-
-  GOBJECT_INTROSPECTION_REQUIRED=0.6.2
-  PKG_CHECK_MODULES([INTROSPECTION],[gobject-introspection-1.0 >= $GOBJECT_INTROSPECTION_REQUIRED])
-  
-  G_IR_SCANNER="$($PKG_CONFIG --variable=g_ir_scanner gobject-introspection-1.0)"
-  G_IR_COMPILER="$($PKG_CONFIG --variable=g_ir_compiler gobject-introspection-1.0)"
-  G_IR_GENERATE="$($PKG_CONFIG --variable=g_ir_generate gobject-introspection-1.0)"
-  GIRDIR="$($PKG_CONFIG --variable=girdir gobject-introspection-1.0)"
-  GIRTYPELIBDIR="$($PKG_CONFIG --variable=typelibdir gobject-introspection-1.0)"
+GOBJECT_INTROSPECTION_CHECK([0.6.7])
 
-  AC_DEFINE([ENABLE_INTROSPECTION],[1],[Define to enable GObject introspection support])
+if test "$found_introspection" = "yes"; then
+  EPIPHANY_FEATURES="$EPIPHANY_FEATURES introspection"
+  AC_DEFINE([ENABLE_INTROSPECTION], [1], [Define to enable introspection support])
 fi
 
-AC_SUBST([G_IR_SCANNER])
-AC_SUBST([G_IR_COMPILER])
-AC_SUBST([G_IR_GENERATE])
-AC_SUBST([GIRDIR])
-AC_SUBST([GIRTYPELIBDIR])
-
-AM_CONDITIONAL([ENABLE_INTROSPECTION],[test "$enable_introspection" = "yes"])
+AC_SUBST([EPIPHANY_FEATURES])
 
 # ****
 # Seed
@@ -260,7 +234,7 @@ AC_ARG_ENABLE([seed],
   [],[enable_seed=no])
 AC_MSG_RESULT([$enable_seed])
 
-if test "$enable_seed" = "yes" -a "$enable_introspection" != "yes"; then
+if test "$enable_seed" = "yes" -a "$found_introspection" != "yes"; then
   AC_MSG_ERROR([GObject introspection support must be enabled for Seed])
 fi
 
@@ -491,7 +465,7 @@ Epiphany was configured with the following options:
 
  	Zeroconf bookmarks support : $enable_zeroconf
  	NetworkManager support     : $enable_network_manager
- 	GObject introspection      : $enable_introspection
+ 	GObject introspection      : $found_introspection
  	Seed support               : $enable_seed
  	NSS support                : $enable_nss
  	Build tests                : $enable_tests
diff --git a/m4/introspection.m4 b/m4/introspection.m4
new file mode 100644
index 0000000..589721c
--- /dev/null
+++ b/m4/introspection.m4
@@ -0,0 +1,94 @@
+dnl -*- mode: autoconf -*-
+dnl Copyright 2009 Johan Dahlin
+dnl
+dnl This file is free software; the author(s) gives unlimited
+dnl permission to copy and/or distribute it, with or without
+dnl modifications, as long as this notice is preserved.
+dnl
+
+# serial 1
+
+m4_define([_GOBJECT_INTROSPECTION_CHECK_INTERNAL],
+[
+    AC_BEFORE([AC_PROG_LIBTOOL],[$0])dnl setup libtool first
+    AC_BEFORE([AM_PROG_LIBTOOL],[$0])dnl setup libtool first
+    AC_BEFORE([LT_INIT],[$0])dnl setup libtool first
+
+    dnl enable/disable introspection
+    m4_if([$2], [require],
+    [dnl
+        enable_introspection=yes
+    ],[dnl
+        AC_ARG_ENABLE(introspection,
+                  AS_HELP_STRING([--enable-introspection[=@<:@no/auto/yes@:>@]],
+                                 [Enable introspection for this build]),, 
+                                 [enable_introspection=auto])
+    ])dnl
+
+    AC_MSG_CHECKING([for gobject-introspection])
+
+    dnl presence/version checking
+    AS_CASE([$enable_introspection],
+    [no], [dnl
+        found_introspection="no (disabled, use --enable-introspection to enable)"
+    ],dnl
+    [yes],[dnl
+        PKG_CHECK_EXISTS([gobject-introspection-1.0],,
+                         AC_MSG_ERROR([gobject-introspection-1.0 is not installed]))
+        PKG_CHECK_EXISTS([gobject-introspection-1.0 >= $1],
+                         found_introspection=yes,
+                         AC_MSG_ERROR([You need to have gobject-introspection >= $1 installed to build AC_PACKAGE_NAME]))
+    ],dnl
+    [auto],[dnl
+        PKG_CHECK_EXISTS([gobject-introspection-1.0 >= $1], found_introspection=yes, found_introspection=no)
+    ],dnl
+    [dnl	
+        AC_MSG_ERROR([invalid argument passed to --enable-introspection, should be one of @<:@no/auto/yes@:>@])
+    ])dnl
+
+    AC_MSG_RESULT([$found_introspection])
+
+    INTROSPECTION_SCANNER=
+    INTROSPECTION_COMPILER=
+    INTROSPECTION_GENERATE=
+    INTROSPECTION_GIRDIR=
+    INTROSPECTION_TYPELIBDIR=
+    if test "x$found_introspection" = "xyes"; then
+       INTROSPECTION_SCANNER=`$PKG_CONFIG --variable=g_ir_scanner gobject-introspection-1.0`
+       INTROSPECTION_COMPILER=`$PKG_CONFIG --variable=g_ir_compiler gobject-introspection-1.0`
+       INTROSPECTION_GENERATE=`$PKG_CONFIG --variable=g_ir_generate gobject-introspection-1.0`
+       INTROSPECTION_GIRDIR=`$PKG_CONFIG --variable=girdir gobject-introspection-1.0`
+       INTROSPECTION_TYPELIBDIR="$($PKG_CONFIG --variable=typelibdir gobject-introspection-1.0)"
+       INTROSPECTION_CFLAGS=`$PKG_CONFIG --cflags gobject-introspection-1.0`
+       INTROSPECTION_LIBS=`$PKG_CONFIG --libs gobject-introspection-1.0`
+       INTROSPECTION_MAKEFILE=`$PKG_CONFIG --variable=datadir gobject-introspection-1.0`/gobject-introspection-1.0/Makefile.introspection
+    fi
+    AC_SUBST(INTROSPECTION_SCANNER)
+    AC_SUBST(INTROSPECTION_COMPILER)
+    AC_SUBST(INTROSPECTION_GENERATE)
+    AC_SUBST(INTROSPECTION_GIRDIR)
+    AC_SUBST(INTROSPECTION_TYPELIBDIR)
+    AC_SUBST(INTROSPECTION_CFLAGS)
+    AC_SUBST(INTROSPECTION_LIBS)
+    AC_SUBST(INTROSPECTION_MAKEFILE)
+
+    AM_CONDITIONAL(HAVE_INTROSPECTION, test "x$found_introspection" = "xyes")
+])
+
+
+dnl Usage:
+dnl   GOBJECT_INTROSPECTION_CHECK([minimum-g-i-version])
+
+AC_DEFUN([GOBJECT_INTROSPECTION_CHECK],
+[
+  _GOBJECT_INTROSPECTION_CHECK_INTERNAL([$1])
+])
+
+dnl Usage:
+dnl   GOBJECT_INTROSPECTION_REQUIRE([minimum-g-i-version])
+
+
+AC_DEFUN([GOBJECT_INTROSPECTION_REQUIRE],
+[
+  _GOBJECT_INTROSPECTION_CHECK_INTERNAL([$1], [require])
+])
diff --git a/src/Makefile.am b/src/Makefile.am
index 2ba6f23..725db9f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -170,7 +170,7 @@ epiphany_LDADD = \
 	$(DBUS_LIBS) \
 	$(LIBINTL)
 
-if ENABLE_INTROSPECTION
+if HAVE_INTROSPECTION
 epiphany_CFLAGS += $(INTROSPECTION_CFLAGS)
 epiphany_LDADD += $(INTROSPECTION_LIBS)
 endif
@@ -266,7 +266,7 @@ CLEANFILES = $(stamp_files) $(BUILT_SOURCES)
 DISTCLEANFILES = $(stamp_files) $(BUILT_SOURCES)
 MAINTAINERCLEANFILES = $(stamp_files) $(BUILT_SOURCES)
 
-if ENABLE_INTROSPECTION
+if HAVE_INTROSPECTION
 EPHY_GIR_H_FILES = \
 	$(top_srcdir)/embed/ephy-embed.h \
 	$(top_srcdir)/embed/ephy-embed-container.h \
@@ -335,10 +335,10 @@ EPHY_GIR_C_FILES = \
 	$(top_srcdir)/src/ephy-window.c \
 	$(NULL)
 
-Epiphany-$(EPIPHANY_API_VERSION).gir: $(G_IR_SCANNER) $(EPHY_GIR_H_FILES) \
+Epiphany-$(EPIPHANY_API_VERSION).gir: $(INTROSPECTION_SCANNER) $(EPHY_GIR_H_FILES) \
                                       $(EPHY_GIR_C_FILES) epiphany
 	$(AM_V_GEN) PKG_CONFIG_PATH=$(top_builddir)/data:$$PKG_CONFIG_PATH \
-	$(G_IR_SCANNER) -v \
+	$(INTROSPECTION_SCANNER) -v \
 		--namespace Epiphany \
 		--nsversion=$(EPIPHANY_API_VERSION) \
 		--add-include-path=. \
@@ -364,10 +364,10 @@ gir_DATA = Epiphany-$(EPIPHANY_API_VERSION).gir
 typelibsdir = $(GIRTYPELIBDIR)
 typelibs_DATA = Epiphany-$(EPIPHANY_API_VERSION).typelib
 
-Epiphany-$(EPIPHANY_API_VERSION).typelib: Epiphany-$(EPIPHANY_API_VERSION).gir $(G_IR_COMPILER)
-	$(AM_V_GEN) g-ir-compiler Epiphany-$(EPIPHANY_API_VERSION).gir -o Epiphany-$(EPIPHANY_API_VERSION).typelib
+Epiphany-$(EPIPHANY_API_VERSION).typelib: Epiphany-$(EPIPHANY_API_VERSION).gir $(INTROSPECTION_COMPILER)
+	$(AM_V_GEN) $(INTROSPECTION_COMPILER) Epiphany-$(EPIPHANY_API_VERSION).gir -o Epiphany-$(EPIPHANY_API_VERSION).typelib
 
 EXTRA_DIST += Epiphany-$(EPIPHANY_API_VERSION).gir
 CLEANFILES += $(gir_DATA) $(typelibs_DATA)
 
-endif # ENABLE_INTROSPECTION
+endif # HAVE_INTROSPECTION