autotools: provide *.cmake files (in addition to *.pc file). (#207)

note: cmake provides both *.pc and *.cmake files.

.gitignore

@@ -17,6 +17,8 @@ libtool
 .deps/
 arpack.pc
 arpackdef.h
+arpack-ng-config.cmake
+arpack-ng-config-version.cmake
 
 # Generated by `make`
 .dirstamp

Makefile.am

@@ -25,4 +25,7 @@ detect_arpack_bug.m4 CMakeLists.txt arpack-ng-config.cmake.in arpack-ng-config-v
 
 pkgconfig_DATA = arpack@LIBSUFFIX@.pc
 
-DISTCLEANFILES = $(pkgconfig_DATA) arpackdef.h
+cmkdir = $(prefix)/lib/cmake
+cmk_DATA = arpack-ng-config.cmake arpack-ng-config-version.cmake
+
+DISTCLEANFILES = $(pkgconfig_DATA) arpackdef.h arpack-ng-config.cmake arpack-ng-config-version.cmake

configure.ac

@@ -238,6 +238,13 @@ AM_CONDITIONAL([ICBEXMM], [test x"$enable_icb_exmm" != x"no"])
 
 m4_ifdef([PKG_INSTALLDIR], [PKG_INSTALLDIR], [AC_SUBST([pkgconfigdir], [${libdir}/pkgconfig])])
 AC_CONFIG_FILES([arpack$LIBSUFFIX.pc:arpack.pc.in], [], [LIBSUFFIX="$LIBSUFFIX"])
+
+AC_SUBST([CMAKE_INSTALL_PREFIX], ["$prefix"])
+AC_CONFIG_FILES([arpack-ng-config.cmake:arpack-ng-config.cmake.in], [], [])
+
+AC_SUBST([arpack_ng_VERSION], ["$VERSION"])
+AC_CONFIG_FILES([arpack-ng-config-version.cmake:arpack-ng-config-version.cmake.in], [], [])
+
 AC_CONFIG_FILES([
 	arpackdef.h
 	Makefile