From: Jan Engelhardt <jengelh@medozas.de>

Put libHX into a versioned directory to detect omission of
"pkg-config libHX --cflags" in dependent projects.

---
 configure.ac        |    3 +++
 include/Makefile.am |    2 +-
 libHX.pc.in         |    3 ++-
 3 files changed, 6 insertions(+), 2 deletions(-)

Index: libHX-3.10.1/configure.ac
===================================================================
--- libHX-3.10.1.orig/configure.ac
+++ libHX-3.10.1/configure.ac
@@ -88,6 +88,9 @@ AC_CHECK_FUNCS([fork execv execvp pipe],
 AC_CHECK_FUNCS([clock_gettime getegid geteuid getpid getppid])
 AM_CONDITIONAL([B_PROC], [test "$b_proc" = 1])
 
+pkgincludedir='${includedir}'/"$PACKAGE_NAME-$PACKAGE_VERSION";
+AC_SUBST([pkgincludedir])
+
 regular_CPPFLAGS="-D_FILE_OFFSET_BITS=64 -D_REENTRANT"
 regular_CFLAGS="-Wall -Waggregate-return -Wmissing-declarations \
 	-Wmissing-prototypes -Wredundant-decls -Wshadow -Wstrict-prototypes \
Index: libHX-3.10.1/include/Makefile.am
===================================================================
--- libHX-3.10.1.orig/include/Makefile.am
+++ libHX-3.10.1/include/Makefile.am
@@ -1,6 +1,6 @@
 # -*- Makefile -*-
 
-nobase_include_HEADERS = libHX.h \
+nobase_pkginclude_HEADERS = libHX.h \
 	libHX/ctype_helper.h libHX/defs.h libHX/deque.h libHX/init.h \
 	libHX/io.h libHX/list.h \
 	libHX/map.h libHX/misc.h libHX/option.h libHX/proc.h libHX/string.h \
Index: libHX-3.10.1/libHX.pc.in
===================================================================
--- libHX-3.10.1.orig/libHX.pc.in
+++ libHX-3.10.1/libHX.pc.in
@@ -3,10 +3,11 @@ prefix=@prefix@
 exec_prefix=@exec_prefix@
 libdir=@libdir@
 includedir=@includedir@
+pkgincludedir=@pkgincludedir@
 
 Name:		libHX
 Description:	Useful collection of routines for C and C++ programming
 Version:	@PACKAGE_VERSION@
-Cflags:		-I${includedir}
+Cflags:		-I${pkgincludedir}
 Libs:		-L${libdir} -lHX
 Libs.private:	-ldl -lpthread -lrt