Set library and header installation directories from configuration

Currently the installation directories for libraries and headers are
resolved within the install commands. For instance, the libraries will
be installed to $(INSTALL_DIR)/$(LIB_DIR). This limits the flexibility
of the installation, such as when the libraries should be installed to a
subdirectory like /usr/lib/tls.

This adds the make variables $(INSTALL_LIB_DIR) and $(INSTALL_INC_DIR)
to define the locations that the libraries and headers are installed.
For the static configs, this resolves exactly as before to
$(INSTALL_DIR)/include and $(INSTALL_DIR)/$(LIB_DIR). For autoconf, they
are derived directly from the --libdir and --includedir settings.

1 files changed, 2 insertions, 2 deletions

diff --git a/glu.pc.in b/glu.pc.in
index 5d6e52a..8606b9b 100644
--- a/glu.pc.in
+++ b/glu.pc.in
@@ -1,7 +1,7 @@
 prefix=@INSTALL_DIR@
 exec_prefix=${prefix}
-libdir=${exec_prefix}/@LIB_DIR@
-includedir=${prefix}/include
+libdir=@INSTALL_LIB_DIR@
+includedir=@INSTALL_INC_DIR@
 
 Name: glu
 Description: Mesa OpenGL Utility library