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| author | Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> | 2018-01-12 09:52:53 +0000 |
|---|---|---|
| committer | Rainer Orth <ro@gcc.gnu.org> | 2018-01-12 09:52:53 +0000 |
| commit | c969e34e3fe457d60c4220554fa3c81d2bdae91b (patch) | |
| tree | a4878f25e329b0be127c17901442243f07da7f73 /gcc/config/sol2.h | |
| parent | a7448bdfbcce56b44a6f3b3cbdc6add9a0b9d6bd (diff) | |
| download | gcc-c969e34e3fe457d60c4220554fa3c81d2bdae91b.zip gcc-c969e34e3fe457d60c4220554fa3c81d2bdae91b.tar.gz gcc-c969e34e3fe457d60c4220554fa3c81d2bdae91b.tar.bz2 | |
Link with correct values-*.o files on Solaris (PR target/40411)
gcc/testsuite:
PR libfortran/67412
* gfortran.dg/execute_command_line_2.f90: Remove dg-xfail-run-if
on *-*-solaris2.10.
libstdc++-v3:
PR libstdc++/64054
* testsuite/27_io/basic_ostream/inserters_arithmetic/char/hexfloat.cc:
Remove dg-xfail-run-if.
gcc:
PR target/40411
* config/sol2.h (STARTFILE_ARCH_SPEC): Don't use with -shared or
-symbolic.
Use values-Xc.o for -pedantic.
Link with values-xpg4.o for C90, values-xpg6.o otherwise.
From-SVN: r256568
Diffstat (limited to 'gcc/config/sol2.h')
| -rw-r--r-- | gcc/config/sol2.h | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/gcc/config/sol2.h b/gcc/config/sol2.h index 1681313..f296cf5 100644 --- a/gcc/config/sol2.h +++ b/gcc/config/sol2.h @@ -169,9 +169,34 @@ along with GCC; see the file COPYING3. If not see #undef SUPPORTS_INIT_PRIORITY #define SUPPORTS_INIT_PRIORITY HAVE_INITFINI_ARRAY_SUPPORT +/* Solaris libc and libm implement multiple behaviours for various + interfaces that have changed over the years in different versions of the + C standard. The behaviour is controlled by linking corresponding + values-*.o objects. Each of these objects contain alternate definitions + of one or more variables that the libraries use to select which + conflicting behaviour they should exhibit. There are two sets of these + objects, values-X*.o and values-xpg*.o. + + The values-X[ac].o objects set the variable _lib_version. The Studio C + compilers use values-Xc.o with either -Xc or (since Studio 12.6) + -pedantic to select strictly conformant ISO C behaviour, otherwise + values-Xa.o. + + The values-xpg[46].o objects define either or both __xpg[46] variables, + selecting XPG4 mode (__xpg4) and conforming C99/SUSv3 behavior (__xpg6). + + Since GCC 5, gcc defaults to -std=gnu11 or higher, so we link + values-xpg6.o to get C99 semantics. Besides, most of the runtime + libraries always require C99 semantics. + + Since only one instance of _lib_version and __xpg[46] takes effekt (the + first in ld.so.1's search path), we only link the values-*.o files into + executable programs. */ #undef STARTFILE_ARCH_SPEC -#define STARTFILE_ARCH_SPEC "%{ansi:values-Xc.o%s} \ - %{!ansi:values-Xa.o%s}" +#define STARTFILE_ARCH_SPEC \ + "%{!shared:%{!symbolic: \ + %{pedantic:values-Xc.o%s; :values-Xa.o%s} \ + %{std=c90|std=gnu90:values-xpg4.o%s; :values-xpg6.o%s}}}" #if defined(HAVE_LD_PIE) && defined(HAVE_SOLARIS_CRTS) #define STARTFILE_CRTBEGIN_SPEC "%{static:crtbegin.o%s; \ |