From b6786564552c3059b327d867836814f5eb671a45 Mon Sep 17 00:00:00 2001
From: Christophe de Dinechin <dinechin@redhat.com>
Date: Thu, 5 Apr 2018 23:47:28 +0200
Subject: [PATCH] Add support for generating pkg-config files

---
 config.mk | 11 ++++++++---
 rules.mk  | 35 ++++++++++++++++++++++++++++++++++-
 2 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/config.mk b/config.mk
index 367400e..0ac7ddf 100644
--- a/config.mk
+++ b/config.mk
@@ -64,6 +64,10 @@ NOT_PARALLEL?=  .NOTPARALLEL
 # Git revision for the current code
 GIT_REVISION:=  $(shell git rev-parse --short HEAD 2> /dev/null || echo "unknown")
 
+# Package installation directory
+PACKAGE_DIR=$(PACKAGE_NAME:%=%/)
+PACKAGE_LIBS=$(MIQ_PRODLIB)
+PACKAGE_DLLS=$(MIQ_PRODDLL)
 
 # Local setup - Location of configuration files, etc (tweaked at install time)
 -include $(MIQ)config.local-setup.mk
@@ -80,10 +84,11 @@ CLANG_FORMAT_SOURCES=$(SOURCES) $(HDR_INSTALL)
 SYSCONFIG?=$(DESTDIR)/etc/
 PREFIX?=$(DESTDIR)/usr/local/
 PREFIX_BIN?=$(PREFIX)bin/
-PREFIX_LIB?=$(PREFIX)lib/
+PREFIX_LIB?=$(PREFIX)lib/$(PACKAGE_DIR)
 PREFIX_DLL?=$(PREFIX_LIB)
-PREFIX_HDR?=$(PREFIX)include/
-PREFIX_SHARE?=$(PREFIX)share/
+PREFIX_HDR?=$(PREFIX)include/$(PACKAGE_DIR)
+PREFIX_SHARE?=$(PREFIX)share/$(PACKAGE_DIR)
+PREFIX_PKGCONFIG=$(PREFIX)share/pkgconfig/
 
 
 #------------------------------------------------------------------------------
diff --git a/rules.mk b/rules.mk
index 0f9714a..93917fc 100644
--- a/rules.mk
+++ b/rules.mk
@@ -68,6 +68,8 @@ MIQ_LDFLAGS=	$(LDFLAGS)				\
 		$(LDFLAGS_VARIANT_$(VARIANT))		\
 		$(LDFLAGS_$*)
 
+MIQ_PACKAGE= 	$(PACKAGE_NAME:%=$(MIQ_OBJDIR)%.pc)
+
 MIQ_INSTALL=	$(TO_INSTALL:%=%.install)		\
 		$(MIQ_OUTEXE:%=%.install_exe)		\
 		$(MIQ_OUTLIB:%=%.install_lib)		\
@@ -75,7 +77,9 @@ MIQ_INSTALL=	$(TO_INSTALL:%=%.install)		\
 		$(EXE_INSTALL:%=%.install_exe)		\
 		$(LIB_INSTALL:%=%.install_lib)		\
 		$(DLL_INSTALL:%=%.install_dll)		\
-		$(HDR_INSTALL:%=%.install_hdr)
+		$(HDR_INSTALL:%=%.install_hdr)		\
+		$(SHR_INSTALL:%=%.install_shr)		\
+		$(MIQ_PACKAGE:%=%.install_pc)
 
 MIQ_SOURCES=	$(SOURCES)				\
 		$(SOURCES_BUILDENV_$(BUILDENV))		\
@@ -543,6 +547,35 @@ benchmark:	$(BENCHMARKS:%=%.benchmark)
 	$(PRINT_INSTALL) $(INSTALL) $* $(PREFIX_DLL)
 %.install_hdr: $(PREFIX_HDR).mkdir-only
 	$(PRINT_INSTALL) $(INSTALL) $* $(PREFIX_HDR)
+%.install_shr: $(PREFIX_SHR).mkdir-only
+	$(PRINT_INSTALL) $(INSTALL) $* $(PREFIX_SHR)
+%.install_pc: $(PREFIX_PKGCONFIG).mkdir-only %
+	$(PRINT_INSTALL) $(INSTALL) $* $(PREFIX_PKGCONFIG)
+
+
+#------------------------------------------------------------------------------
+#  Generation of pkg-config data file
+#------------------------------------------------------------------------------
+
+MIQ_PACKAGELIBS=$(PACKAGE_LIBS:%.lib=$(LINK_LIB_OPT)%)	\
+		$(PACKAGE_DLLS:%.dll=$(LINK_DLL_OPT)%)
+MIQ_GENPC=					  	 \
+	(echo 'prefix=$(PREFIX)'			;\
+	echo 'exec_prefix=$${prefix}'			;\
+	echo 'libdir=$(PREFIX_LIB)'			;\
+	echo 'includedir=$(PREFIX_HDR)'			;\
+	echo 'Name: $(PACKAGE_NAME)'			;\
+	echo 'Description: $(PACKAGE_DESCRIPTION)'	;\
+	echo 'Version: $(PACKAGE_VERSION)'		;\
+	echo 'URL: $(PACKAGE_URL)'			;\
+	echo 'Requires: $(PACKAGE_REQUIRES)'		;\
+	echo 'Conflicts: $(PACKAGE_CONFLICTS)'		;\
+	echo 'Libs: -L$${libdir} $(MIQ_PACKAGELIBS)'	;\
+	echo 'Cflags: -I$${includedir}'			)
+
+$(MIQ_PACKAGE):						$(MIQ_MAKEDEPS)
+	$(PRINT_BUILD)	$(MIQ_GENPC) > $@
+
 
 #------------------------------------------------------------------------------
 #  Clang format