Don't just specify -I${includedir}/cupsfilters,
but also -I${includedir} in the Cflags
in the pkgconfig file.
This way, includes prefixed with the "cupsfilters/" directory path also work.
This e.g. makes the libppd build work when
libcupsfilters is installed in a non-default path
(e.g. configured with --prefix=$HOME/temp/cpdb)
and libppd is configured to use that one
(e.g. by setting env variable
PKG_CONFIG_PATH=$HOME/temp/cpdb/lib/pkgconfig/
during configure).
Without this commit, libppd's configure would
succeed in the above scenario, but the actual build using make would then fail to find the cupsfilters headers:
make all-recursive
make[1]: Entering directory '/home/michi/development/git/libppd'
make[2]: Entering directory '/home/michi/development/git/libppd'
CC ppd/libppd_la-ppd-attr.lo
In file included from ppd/ppd-attr.c:16:
./ppd/ppd.h:26:12: fatal error: cupsfilters/log.h: No such file or directory
26 | # include <cupsfilters/log.h>
| ^~~~~~~~~~~~~~~~~~~
compilation terminated.
(This is with libppd [1] git master as of commit
327b61cf5ec3bc74677e3b56fde4c8c4e9acdcb7).
Don't just specify
-I${includedir}/cupsfilters, but also-I${includedir}in the Cflags in the pkgconfig file.This way, includes prefixed with the "cupsfilters/" directory path also work.
This e.g. makes the libppd build work when libcupsfilters is installed in a non-default path (e.g. configured with
--prefix=$HOME/temp/cpdb) and libppd is configured to use that one (e.g. by setting env variablePKG_CONFIG_PATH=$HOME/temp/cpdb/lib/pkgconfig/during configure).Without this commit, libppd's configure would succeed in the above scenario, but the actual build using
makewould then fail to find the cupsfilters headers:(This is with libppd [1] git master as of commit 327b61cf5ec3bc74677e3b56fde4c8c4e9acdcb7).
[1] https://github.com/OpenPrinting/libppd