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| author | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2020-05-05 12:33:11 +0200 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2020-05-05 12:42:22 +0200 |
| commit | 5269b24605b17211f34dd40df2d18ba7a7f481e2 (patch) | |
| tree | 8837eee81dbd7ff67d62c12f8dacc61f95c4995f /gcc | |
| parent | 2badc9885330b56dfabb49328c42de792bc67b1e (diff) | |
| download | gcc-5269b24605b17211f34dd40df2d18ba7a7f481e2.zip gcc-5269b24605b17211f34dd40df2d18ba7a7f481e2.tar.gz gcc-5269b24605b17211f34dd40df2d18ba7a7f481e2.tar.bz2 | |
Silence warning in LTO mode on VxWorks
The link phase is always partial (-r) for VxWorks in kernel mode, which
means that it uses incremental LTO linking by default (-flinker-output=rel).
But in this mode the LTO plugin outputs a warning if one of the object files
involved in the link does not contain LTO bytecode, before switching to
nolto-rel mode. We do not do repeated incremental linking for VxWorks so
silence the warning.
lto-plugin/
* lto-plugin.c: Document -linker-output-auto-notlo-rel option.
(linker_output_set): Change type to bool.
(linker_output_known): Likewise.
(linker_output_auto_nolto_rel): New variable.
(all_symbols_read_handler): Take it into account.
<LDPO_REL>: Do not issue the warning if it is set.
(process_option): Process -linker-output-auto-notlo-rel.
(cleanup_handler): Remove unused variable.
(onload) <LDPT_LINKER_OUTPUT>: Adjust to above type change.
gcc/
* gcc.c (LTO_PLUGIN_SPEC): Define if not already.
(LINK_PLUGIN_SPEC): Execute LTO_PLUGIN_SPEC.
* config/vxworks.h (LTO_PLUGIN_SPEC): Define.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/vxworks.h | 8 | ||||
| -rw-r--r-- | gcc/gcc.c | 5 |
3 files changed, 19 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7363478..71977b5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2020-05-05 Eric Botcazou <ebotcazou@adacore.com> + * gcc.c (LTO_PLUGIN_SPEC): Define if not already. + (LINK_PLUGIN_SPEC): Execute LTO_PLUGIN_SPEC. + * config/vxworks.h (LTO_PLUGIN_SPEC): Define. + +2020-05-05 Eric Botcazou <ebotcazou@adacore.com> + * gimplify.c (gimplify_init_constructor): Do not put the constructor into static memory if it is not complete. diff --git a/gcc/config/vxworks.h b/gcc/config/vxworks.h index 58c0e78..d648d2f 100644 --- a/gcc/config/vxworks.h +++ b/gcc/config/vxworks.h @@ -273,3 +273,11 @@ extern void vxworks_asm_out_destructor (rtx symbol, int priority); #undef DWARF_GNAT_ENCODINGS_DEFAULT #define DWARF_GNAT_ENCODINGS_DEFAULT \ (TARGET_VXWORKS7 ? DWARF_GNAT_ENCODINGS_MINIMAL : DWARF_GNAT_ENCODINGS_ALL) + +/* The default configuration of incremental LTO linking (-flinker-output=rel) + warns if an object file included in the link does not contain LTO bytecode, + because in this case the output will not contain it either, thus preventing + further incremental LTO linking. We do not do repeated incremental linking + so silence the warning (instead of passing -flinker-output=nolto-rel). */ +#undef LTO_PLUGIN_SPEC +#define LTO_PLUGIN_SPEC "%{!mrtp:-plugin-opt=-linker-output-auto-notlo-rel}" @@ -944,6 +944,10 @@ proper position among the other output files. */ # endif #endif +#ifndef LTO_PLUGIN_SPEC +#define LTO_PLUGIN_SPEC "" +#endif + /* Conditional to test whether the LTO plugin is used or not. FIXME: For slim LTO we will need to enable plugin unconditionally. This still cause problems with PLUGIN_LD != LD and when plugin is built but @@ -968,6 +972,7 @@ proper position among the other output files. */ -plugin %(linker_plugin_file) \ -plugin-opt=%(lto_wrapper) \ -plugin-opt=-fresolution=%u.res \ + " LTO_PLUGIN_SPEC "\ %{flinker-output=*:-plugin-opt=-linker-output-known} \ %{!nostdlib:%{!nodefaultlibs:%:pass-through-libs(%(link_gcc_c_sequence))}} \ }" PLUGIN_COND_CLOSE |