Generate and install pkg-config module file

Signed-off-by: Marcin Serwin <marcin@serwin.dev>

Author: marcin-serwin

.gitignore

@@ -3,3 +3,4 @@ stb_image.h
 stb_image_write.h
 qoibench
 qoiconv
+qoi.pc

Makefile

@@ -10,6 +10,7 @@ TARGET_CONV ?= qoiconv
 PREFIX ?= /usr/local
 BINDIR ?= $(PREFIX)/bin
 INCLUDEDIR ?= $(PREFIX)/include
+LIBDIR ?= $(PREFIX)/lib
 
 all: $(TARGET_BENCH) $(TARGET_CONV)
 
@@ -21,6 +22,9 @@ conv: $(TARGET_CONV)
 $(TARGET_CONV):$(TARGET_CONV).c qoi.h
 	$(CC) $(CFLAGS_CONV) $(CFLAGS) $(TARGET_CONV).c -o $(TARGET_CONV) $(LFLAGS_CONV)
 
+qoi.pc: pc_gen.sh
+	./pc_gen.sh "$(PREFIX)" "$(INCLUDEDIR)" > qoi.pc
+
 .PHONY: install
 install: install-tools install-header
 
@@ -32,6 +36,7 @@ install-tools: all
 .PHONY: install-header
 install-header: qoi.h qoi.pc
 	install -Dm 644 qoi.h $(DESTDIR)$(INCLUDEDIR)/qoi.h
+	install -Dm 644 qoi.pc $(DESTDIR)$(LIBDIR)/pkgconfig/qoi.pc
 
 .PHONY: clean
 clean:

pc_gen.sh

@@ -0,0 +1,19 @@
+prefix=$1
+includedir=$2
+
+if [[ $includedir == $prefix* ]]
+then
+  includedir='${prefix}'${includedir#"$prefix"}
+fi
+
+cat << EOF
+prefix=$prefix
+includedir=$includedir
+
+Name: qoi
+Description: The "Quite OK Image Format" for fast, lossless image compression
+Version: 0
+URL: https://qoiformat.org/
+License: MIT
+Cflags: -I\${includedir}
+EOF