diff options
Diffstat (limited to 'gcc/config/pa/som.h')
| -rw-r--r-- | gcc/config/pa/som.h | 53 |
1 files changed, 49 insertions, 4 deletions
diff --git a/gcc/config/pa/som.h b/gcc/config/pa/som.h index 98c66fbfe37..7609fdbe176 100644 --- a/gcc/config/pa/som.h +++ b/gcc/config/pa/som.h @@ -362,10 +362,6 @@ do { \ /* The .align directive in the HP assembler allows up to a 32 alignment. */ #define MAX_OFILE_ALIGNMENT 32768 -/* SOM does not support the init_priority C++ attribute. */ -#undef SUPPORTS_INIT_PRIORITY -#define SUPPORTS_INIT_PRIORITY 0 - /* The SOM linker hardcodes paths into binaries. As a result, dotdots must be removed from library prefixes to prevent binaries from depending on the location of the GCC tool directory. The downside is GCC @@ -375,3 +371,52 @@ do { \ /* Aggregates with a single float or double field should be passed and returned in the general registers. */ #define MEMBER_TYPE_FORCES_BLK(FIELD, MODE) (MODE==SFmode || MODE==DFmode) + +/* If GAS supports weak, we can support weak when we have working linker + support for secondary definitions and are generating code for GAS. */ +#ifdef HAVE_GAS_WEAK +#define SUPPORTS_WEAK (TARGET_SOM_SDEF && TARGET_GAS) +#else +#define SUPPORTS_WEAK 0 +#endif + +/* We can support one only if we support weak. */ +#define SUPPORTS_ONE_ONLY SUPPORTS_WEAK + +/* Use weak (secondary definitions) to make one only declarations. */ +#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1) + +/* This is how we tell the assembler that a symbol is weak. The SOM + weak implementation uses the secondary definition (sdef) flag. + + The behavior of sdef symbols is similar to ELF weak symbols in that + multiple definitions can occur without incurring a link error. + However, they differ in the following ways: + 1) Undefined sdef symbols are not allowed. + 2) The linker searches for undefined sdef symbols and will load an + archive library member to resolve an undefined sdef symbol. + 3) The exported symbol from a shared library is a primary symbol + rather than a sdef symbol. Thus, more care is needed in the + ordering of libraries. + + It appears that the linker discards extra copies of "weak" functions + when linking shared libraries, independent of whether or not they + are in their own section. In linking final executables, -Wl,-O can + be used to remove dead procedures. Thus, support for named sections + is not needed and in previous testing caused problems with various + HP tools. */ +#define ASM_WEAKEN_LABEL(FILE,NAME) \ + do { fputs ("\t.weak\t", FILE); \ + assemble_name (FILE, NAME); \ + fputc ('\n', FILE); \ + if (! FUNCTION_NAME_P (NAME)) \ + { \ + fputs ("\t.EXPORT ", FILE); \ + assemble_name (FILE, NAME); \ + fputs (",DATA\n", FILE); \ + } \ + } while (0) + +/* We can't handle weak aliases, and therefore can't support pragma weak. + Suppress the use of pragma weak in gthr-dce.h and gthr-posix.h. */ +#define GTHREAD_USE_WEAK 0 |