Add crystfel.pc file for pkg-config

.gitignore

@@ -48,3 +48,4 @@ build-aux/ltmain.sh
 lib/.libs/
 lib/dummy.lo
 lib/libgnu.la
+libcrystfel/crystfel.pc

configure.ac

@@ -305,4 +305,5 @@ HTML_DIR=${docdir}/reference
 
 
 AC_CONFIG_FILES(Makefile lib/Makefile doc/reference/Makefile libcrystfel/Makefile)
+AC_CONFIG_FILES(libcrystfel/crystfel.pc)
 AC_OUTPUT

libcrystfel/Makefile.am

@@ -29,3 +29,6 @@ libcrystfel_la_include_HEADERS = src/beam-parameters.h src/hdf5-file.h \
 INCLUDES = "-I$(top_srcdir)/data"
 AM_CPPFLAGS = -DDATADIR=\""$(datadir)"\" -I$(top_builddir)/lib -Wall
 AM_CPPFLAGS += -I$(top_srcdir)/lib @LIBCRYSTFEL_CFLAGS@
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = crystfel.pc

libcrystfel/crystfel.pc.in

+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: CrystFEL
+Description: Useful routines for crystallography using a free-electron laser
+Version: @VERSION@
+Cflags: -I${includedir}
+Libs: -L${libdir} -lcrystfel