Try having relative paths in pkg-config file.
Addresses #248
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8611a40..93f89df 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -281,11 +281,12 @@
# pkgconfig file
-set(prefix ${CMAKE_INSTALL_PREFIX})
-set(exec_prefix \${prefix})
-SET(bindir ${CMAKE_INSTALL_FULL_BINDIR})
-SET(libdir ${CMAKE_INSTALL_FULL_LIBDIR})
-SET(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR})
+file(RELATIVE_PATH pc_relative_bindir ${CMAKE_INSTALL_PREFIX} ${CMAKE_INSTALL_FULL_BINDIR})
+set(bindir "\${prefix}/${pc_relative_bindir}")
+file(RELATIVE_PATH pc_relative_libdir ${CMAKE_INSTALL_PREFIX} ${CMAKE_INSTALL_FULL_LIBDIR})
+set(libdir "\${prefix)/${pc_relative_libdir}")
+file(RELATIVE_PATH pc_relative_includedir ${CMAKE_INSTALL_PREFIX} ${CMAKE_INSTALL_FULL_INCLUDEDIR})
+set(includedir "\${prefix}/${pc_relative_includedir}")
if(CMAKE_SYSTEM_NAME MATCHES BSD)
set(PKG_CONFIG_RPATH "-Wl,-R\${libdir}")
endif(CMAKE_SYSTEM_NAME MATCHES BSD)
diff --git a/libzip.pc.in b/libzip.pc.in
index 58b3dca..d51b0ab 100644
--- a/libzip.pc.in
+++ b/libzip.pc.in
@@ -1,10 +1,10 @@
-prefix=@prefix@
-exec_prefix=@exec_prefix@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
bindir=@bindir@
libdir=@libdir@
includedir=@includedir@
-zipcmp=@bindir@/zipcmp
+zipcmp=${bindir}/zipcmp
Name: libzip
Description: library for handling zip archives
@@ -12,4 +12,3 @@
Libs: @PKG_CONFIG_RPATH@ -L${libdir} -lzip
Libs.private: @LIBS@
Cflags: -I${includedir}
-
