Use CFLAGS_SL while probing linkability of libperl. On recent Red Hat platforms (at least RHEL 8 and Fedora 30, maybe older), configure's probe for libperl failed if the user forces CFLAGS to be -O0. This is because some code in perl's inline.h fails to be optimized away at -O0, and said code doesn't work if compiled without -fPIC.
To fix, add CFLAGS_SL to the compile flags used during the libperl probe. This is a better simulation of the way that plperl is built, anyway, so it might forestall other issues in future. Per gripe from Kyotaro Horiguchi. Back-patch to all supported branches, since people might want to build older branches on these platforms. Discussion: https://postgr.es/m/20191010.144533.263180400.horikyota....@gmail.com Branch ------ REL_11_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/4e19bd41d965b3b3fc9b2fc0022a968a71fbceff Modified Files -------------- configure | 5 +++++ configure.in | 5 +++++ 2 files changed, 10 insertions(+)