[New-bugs-announce] [issue20324] gcc-4.3 support on python-3.3 (libmpdec)

[Dirkjan Ochtman]

New submission from Dirkjan Ochtman:

See https://bugs.gentoo.org/show_bug.cgi?id=498640:

What compiler versions are supported for 3.3? We noticed an issue when compiling 3.3.3 with gcc 4.3:

/usr/lib/gcc/x86_64-pc-linux-gnu/4.2.4/../../../../x86_64-pc-linux-gnu/bin/ld: build/temp.linux-x86_64-3.3/var/tmp/portage/dev-lang/python-3.3.3/work/Python-3.3.3/Modules/_decimal/libmpdec/mpdecimal.o: warning: relocation against `mprime_rdx' in readonly section `.text'.
/usr/lib/gcc/x86_64-pc-linux-gnu/4.2.4/../../../../x86_64-pc-linux-gnu/bin/ld: build/temp.linux-x86_64-3.3/var/tmp/portage/dev-lang/python-3.3.3/work/Python-3.3.3/Modules/_decimal/libmpdec/basearith.o: relocation R_X86_64_PC32 against symbol `mprime_rdx' can not be used when making a shared object; recompile with -fPIC
/usr/lib/gcc/x86_64-pc-linux-gnu/4.2.4/../../../../x86_64-pc-linux-gnu/bin/ld: final link failed: Bad value

Ruud Koolen <redlizard at gentoo.org> came up with a patch:

diff -r f7cebf727bc6 Modules/_decimal/libmpdec/constants.c
--- a/Modules/_decimal/libmpdec/constants.c	Mon Jan 20 21:59:33 2014 +0200
+++ b/Modules/_decimal/libmpdec/constants.c	Mon Jan 20 22:12:50 2014 +0100
@@ -71,6 +71,9 @@
   };
 
   /* magic number for constant division by MPD_RADIX */
+#if defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 3))
+ __attribute__((visibility("hidden")))
+#endif
   const mpd_uint_t mprime_rdx = 15581492618384294730ULL;
 
 #elif defined(CONFIG_32)

----------
components: Library (Lib)
keywords: 3.3regression
messages: 208630
nosy: djc, skrah
priority: normal
severity: normal
status: open
title: gcc-4.3 support on python-3.3 (libmpdec)
versions: Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20324>
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