perl : fix build without compiler optimization

CC       perl_la-perl.lo
In file included from /usr/include/stdio.h:27:0,
                 from ./daemon/collectd.h:34,
                 from perl.c:36:
/usr/include/features.h:331:4: error: #warning _FORTIFY_SOURCE requires
compiling with optimization (-O) [-Werror=cpp]
 #  warning _FORTIFY_SOURCE requires compiling with optimization (-O)
    ^~~~~~~
cc1: all warnings being treated as errors
Makefile:4439: recipe for target 'perl_la-perl.lo' failed
make[3]: *** [perl_la-perl.lo] Error 1

ccflags contains the flags used to compile libperl itself, not the ones
needed for compiling code that uses it. Switch to perl_inc which just
returns the neccesary include flags

Fixes #1858

diff --git a/configure.ac b/configure.ac
index 2ac9c72..1b38efc 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -3656,7 +3656,7 @@ then
   SAVE_CFLAGS="$CFLAGS"
   SAVE_LIBS="$LIBS"
 dnl ARCHFLAGS="" -> disable multi -arch on OSX (see Config_heavy.pl:fetch_string)
-  PERL_CFLAGS=`ARCHFLAGS="" $perl_interpreter -MExtUtils::Embed -e ccopts`
+  PERL_CFLAGS=`ARCHFLAGS="" $perl_interpreter -MExtUtils::Embed -e perl_inc`
   PERL_LIBS=`ARCHFLAGS="" $perl_interpreter -MExtUtils::Embed -e ldopts`
   CFLAGS="$CFLAGS $PERL_CFLAGS"
   LIBS="$LIBS $PERL_LIBS"