Daniel has a point, that the @VAR@ strings need to be protected against configure...

We thus introduce quoting again here, but using only double quotes seems a safer choice though:
This variable is used as
sed -e '$(pkgconf_SUBST)'
so quote matching does not happen the way it seems at first glance

diff --git a/m4/pkgconfig.am b/m4/pkgconfig.am
index a48b0c2..627ca03 100644 (file)
--- a/m4/pkgconfig.am
+++ b/m4/pkgconfig.am
@@ -25,16 +25,16 @@ pkgconf_DATA            =  $(addsuffix .pc, $(PKGCONFIG_FILES))
 CLEANFILES             += $(addsuffix .pc,       $(PKGCONFIG_FILES))
 EXTRA_DIST             += $(addsuffix .pc.subst, $(PKGCONFIG_FILES))
 
 CLEANFILES             += $(addsuffix .pc,       $(PKGCONFIG_FILES))
 EXTRA_DIST             += $(addsuffix .pc.subst, $(PKGCONFIG_FILES))
 

-pkgconf_SUBST =                s!@PACKAGE@!"$(PACKAGE)"!g;                                     \
-                       s!@VERSION@!"$(VERSION)"!g;                                     \
-                       s!@prefix@!"$(prefix)"!g;                                       \
-                       s!@exec_prefix@!"$(exec_prefix)"!g;                             \
-                       s!@libdir@!"$(libdir)"!g;                                       \
-                       s!@includedir@!"$(includedir)"!g;                               \
-                       s!@libflags@!"$${libflags}$(pkgconf_LIBFLAGS)"!g;               \
-                       s!@incflags@!"$${incflags}$(pkgconf_INCFLAGS)"!g;               \
-                       s!@pkgincflags@!"$${pkgincflags}$(pkgconf_PKGINCFLAGS)"!g;      \
-                       s!@pkgincludedir@!"$(pkgincludedir)"!g
+pkgconf_SUBST =                s!@"PACKAGE"@!"$(PACKAGE)"!g;                                   \
+                       s!@"VERSION"@!"$(VERSION)"!g;                                   \
+                       s!@"prefix"@!"$(prefix)"!g;                                     \
+                       s!@"exec_prefix"@!"$(exec_prefix)"!g;                           \
+                       s!@"libdir"@!"$(libdir)"!g;                                     \
+                       s!@"includedir"@!"$(includedir)"!g;                             \
+                       s!@"libflags"@!"$${libflags}$(pkgconf_LIBFLAGS)"!g;             \
+                       s!@"incflags"@!"$${incflags}$(pkgconf_INCFLAGS)"!g;             \
+                       s!@"pkgincflags"@!"$${pkgincflags}$(pkgconf_PKGINCFLAGS)"!g;    \
+                       s!@"pkgincludedir"@!"$(pkgincludedir)"!g

 
 
 %.pc:                  %.pc.subst Makefile
 
 
 %.pc:                  %.pc.subst Makefile