diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 11 | ||||
| -rw-r--r-- | gcc/config/darwin.h | 74 | ||||
| -rw-r--r-- | gcc/config/rs6000/darwin.h | 20 |
3 files changed, 75 insertions, 30 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e407904..f1794c8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,14 @@ +2019-07-03 Iain Sandoe <iain@sandoe.co.uk> + + * config/darwin.h (REAL_LIBGCC_SPEC): Adjust for earlier Darwin. + (STARTFILE_SPEC): Split crt3 into a separate spec. + (DARWIN_EXTRA_SPECS): Add crt2 and crt3 spec. + (DARWIN_CRT2_SPEC): New. + (DARWIN_CRT3_SPEC): New. + (MIN_LD64_OMIT_STUBS): Revise to 62.1. + * config/rs6000/darwin.h (DARWIN_CRT2_SPEC): Revise conditions. + (DARWIN_CRT3_SPEC): New. + 2019-07-03 Michael Meissner <meissner@linux.ibm.com> * config/rs6000/altivec.md (altivec_mov<mode>, VM2 iterator): diff --git a/gcc/config/darwin.h b/gcc/config/darwin.h index ae324f1..72215ce 100644 --- a/gcc/config/darwin.h +++ b/gcc/config/darwin.h @@ -189,8 +189,15 @@ extern GTY(()) int darwin_ms_struct; #define DARWIN_NOCOMPACT_UNWIND \ " %:version-compare(>= 10.6 mmacosx-version-min= -no_compact_unwind) " -/* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus - precomp, libtool, and fat build additions. +/* In Darwin linker specs we can put -lcrt0.o and ld will search the library + path for crt0.o or -lcrtx.a and it will search for for libcrtx.a. As for + other ports, we can also put xxx.{o,a}%s and get the appropriate complete + startfile absolute directory. This latter point is important when we want + to override ld's rule of .dylib being found ahead of .a and the user wants + the convenience library to be linked. */ + +/* The LINK_COMMAND spec is mostly a clone of the standard LINK_COMMAND_SPEC, + plus precomp, libtool, and fat build additions. In general, random Darwin linker flags should go into LINK_SPEC instead of LINK_COMMAND_SPEC. The command spec is better for @@ -352,43 +359,42 @@ extern GTY(()) int darwin_ms_struct; /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib libraries to link against, and by not linking against libgcc_s on - earlier-than-10.3.9. + earlier-than-10.3.9. If we need exceptions, prior to 10.3.9, then we have + to link the static eh lib, since there's no shared version on the system. + + Note that by default, except as above, -lgcc_eh is not linked against. + This is because,in general, we need to unwind through system libraries that + are linked with the shared unwinder in libunwind (or libgcc_s for 10.4/5). - Note that by default, -lgcc_eh is not linked against! This is - because in a future version of Darwin the EH frame information may - be in a new format, or the fallback routine might be changed; if - you want to explicitly link against the static version of those - routines, because you know you don't need to unwind through system - libraries, you need to explicitly say -static-libgcc. + The static version of the current libgcc unwinder (which differs from the + implementation in libunwind.dylib on systems Darwin10 [10.6]+) can be used + by specifying -static-libgcc. - If it is linked against, it has to be before -lgcc, because it may + If libgcc_eh is linked against, it has to be before -lgcc, because it might need symbols from -lgcc. */ + #undef REAL_LIBGCC_SPEC #define REAL_LIBGCC_SPEC \ "%{static-libgcc|static: -lgcc_eh -lgcc; \ - shared-libgcc|fexceptions|fgnu-runtime: \ - %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \ + shared-libgcc|fexceptions|fobjc-exceptions|fgnu-runtime: \ + %:version-compare(!> 10.3.9 mmacosx-version-min= -lgcc_eh) \ + %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \ %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \ - %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ + %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \ -lgcc ; \ :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \ %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \ - %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ + %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \ -lgcc }" -/* We specify crt0.o as -lcrt0.o so that ld will search the library path. - - crt3.o provides __cxa_atexit on systems that don't have it. Since - it's only used with C++, which requires passing -shared-libgcc, key - off that to avoid unnecessarily adding a destructor to every - powerpc program built. */ +/* We specify crt0.o as -lcrt0.o so that ld will search the library path. */ #undef STARTFILE_SPEC #define STARTFILE_SPEC \ - "%{Zdynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}} \ - %{!Zdynamiclib:%{Zbundle:%{!static: \ +"%{Zdynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}} \ + %{!Zdynamiclib:%{Zbundle:%{!static: \ %:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o) \ %{fgnu-tm: -lcrttms.o}}} \ %{!Zbundle:%{pg:%{static:-lgcrt0.o} \ @@ -402,7 +408,7 @@ extern GTY(()) int darwin_ms_struct; %{!object:%{preload:-lcrt0.o} \ %{!preload: %(darwin_crt1) \ %(darwin_crt2)}}}}}} \ - %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}" + %(darwin_crt3)" /* We want a destructor last in the list. */ #define TM_DESTRUCTOR "%{fgnu-tm: -lcrttme.o}" @@ -410,18 +416,30 @@ extern GTY(()) int darwin_ms_struct; #define DARWIN_EXTRA_SPECS \ { "darwin_crt1", DARWIN_CRT1_SPEC }, \ + { "darwin_crt2", DARWIN_CRT2_SPEC }, \ + { "darwin_crt3", DARWIN_CRT3_SPEC }, \ { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, -#define DARWIN_DYLIB1_SPEC \ - "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \ - %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)" - #define DARWIN_CRT1_SPEC \ "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \ %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o) \ %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o) \ %{fgnu-tm: -lcrttms.o}" +#define DARWIN_CRT2_SPEC "" + +/* crt3.o provides __cxa_atexit on systems that don't have it (and a fix + up for faulty versions on 10.4). Since it's only used with C++, which + requires passing -shared-libgcc, key off that to avoid unnecessarily + adding a destructor to every program built for 10.4 or earlier. */ + +#define DARWIN_CRT3_SPEC \ +"%{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}" + +#define DARWIN_DYLIB1_SPEC \ + "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \ + %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)" + #ifdef HAVE_AS_MMACOSX_VERSION_MIN_OPTION /* Emit macosx version (but only major). */ #define ASM_MMACOSX_VERSION_MIN_SPEC \ @@ -996,7 +1014,7 @@ extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **); /* From at least version 62.1, ld64 can build PIC indirection stubs as needed, and there is no need for the compiler to emit them. */ -#define MIN_LD64_OMIT_STUBS "85.2" +#define MIN_LD64_OMIT_STUBS "62.1" #ifndef LD64_VERSION #define LD64_VERSION "62.1" diff --git a/gcc/config/rs6000/darwin.h b/gcc/config/rs6000/darwin.h index 7b3b232..b0b5047 100644 --- a/gcc/config/rs6000/darwin.h +++ b/gcc/config/rs6000/darwin.h @@ -128,9 +128,25 @@ extern int darwin_emit_picsym_stub; %:version-compare(>< 10.5 10.7 mmacosx-version-min= -lcrt1.10.5.o) \ %{fgnu-tm: -lcrttms.o}" -/* crt2.o is at least partially required for 10.3.x and earlier. */ +/* crt2.o is at least partially required for 10.3.x and earlier. + It deals with registration of the unwind frames, where this is not + automatically provided by the system. So we need it for any case that + might use exceptions. */ +#undef DARWIN_CRT2_SPEC #define DARWIN_CRT2_SPEC \ - "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}" +"%{!m64:%{shared-libgcc|static-libstdc++|fexceptions|fobjc-exceptions|fgnu-runtime: \ + %:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s) \ + }}" + +/* crt3 deals with providing cxa_atexit on earlier systems (or fixing it up, + for broken versions). It's only needed for c++ code, so we can make it + conditional on shared-libgcc since that's forced on for c++. */ +#undef DARWIN_CRT3_SPEC +#define DARWIN_CRT3_SPEC \ +"%{!m64:%{shared-libgcc|static-libstdc++: \ + %:version-compare(>< 10.4 10.5 mmacosx-version-min= crt3.o%s) \ + %:version-compare(!> 10.4 mmacosx-version-min= crt3_2.o%s) \ + }}" /* The PPC regs save/restore functions are leaves and could, conceivably be used by the tm destructor. */ |