Some external packages call pg_config to determine the installed
PostgreSQL cflags_sl option. Add this output to Buildroots own
pg_config, so these packages correctly compile.
Default value is defined at src/template/linux as:
Extra CFLAGS for code that will go into a shared library
CFLAGS_SL="-fPIC"
Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit ed4cfbb773)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>