diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | configure.ac | 16 | ||||
| -rw-r--r-- | lib/ChangeLog | 5 | ||||
| -rw-r--r-- | lib/eu-config.h | 4 | ||||
| -rw-r--r-- | libdw/ChangeLog | 5 | ||||
| -rw-r--r-- | libdw/libdwP.h | 2 | ||||
| -rw-r--r-- | libdw/libdw_alloc.c | 2 | ||||
| -rw-r--r-- | libelf/ChangeLog | 4 | ||||
| -rw-r--r-- | libelf/libelfP.h | 2 |
9 files changed, 42 insertions, 3 deletions
@@ -1,5 +1,10 @@ 2017-04-27 Ulf Hermann <[email protected]> + * configure.ac: Check if the compiler supports + __attribute__((visibility(...))). + +2017-04-27 Ulf Hermann <[email protected]> + * configure.ac: Check if -fPIC, -fPIE, -Wl,-z,defs, and -Wl,-z,relro are supported by the compiler. diff --git a/configure.ac b/configure.ac index e6e3b675..c4fc7e3d 100644 --- a/configure.ac +++ b/configure.ac @@ -127,6 +127,22 @@ CFLAGS="$old_CFLAGS"]) AS_IF([test "x$ac_cv_c99" != xyes], AC_MSG_ERROR([gcc with GNU99 support required])) +AC_CACHE_CHECK([whether gcc supports __attribute__((visibility()))], + ac_cv_visibility, [dnl +save_CFLAGS="$CFLAGS" +CFLAGS="$save_CFLAGS -Werror" +AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl +int __attribute__((visibility("hidden"))) +foo (int a) +{ + return a; +}])], ac_cv_visibility=yes, ac_cv_visibility=no) +CFLAGS="$save_CFLAGS"]) +if test "$ac_cv_visibility" = "yes"; then + AC_DEFINE([HAVE_VISIBILITY], [1], + [Defined if __attribute__((visibility())) is supported]) +fi + AC_CACHE_CHECK([whether gcc supports -fPIC], ac_cv_fpic, [dnl save_CFLAGS="$CFLAGS" CFLAGS="$save_CFLAGS -fPIC -Werror" diff --git a/lib/ChangeLog b/lib/ChangeLog index 67ef2792..23c0f41b 100644 --- a/lib/ChangeLog +++ b/lib/ChangeLog @@ -1,5 +1,10 @@ 2017-04-27 Ulf Hermann <[email protected]> + * eu-config.h: Define attribute_hidden to be empty if the compiler + doesn't support it. + +2017-04-27 Ulf Hermann <[email protected]> + * Makefile.am: Use fpic_CFLAGS. 2017-07-18 Mark Wielaard <[email protected]> diff --git a/lib/eu-config.h b/lib/eu-config.h index 400cdc6e..07098282 100644 --- a/lib/eu-config.h +++ b/lib/eu-config.h @@ -68,8 +68,12 @@ #define internal_strong_alias(name, aliasname) \ extern __typeof (name) aliasname __attribute__ ((alias (#name))) internal_function; +#ifdef HAVE_VISIBILITY #define attribute_hidden \ __attribute__ ((visibility ("hidden"))) +#else +#define attribute_hidden /* empty */ +#endif /* Define ALLOW_UNALIGNED if the architecture allows operations on unaligned memory locations. */ diff --git a/libdw/ChangeLog b/libdw/ChangeLog index 67d7799d..c13344af 100644 --- a/libdw/ChangeLog +++ b/libdw/ChangeLog @@ -1,5 +1,10 @@ 2017-02-27 Ulf Hermann <[email protected]> + * libdwP.h: Use attribute_hidden. + * libdw_alloc.c: Likewise. + +2017-02-27 Ulf Hermann <[email protected]> + * Makefile.am: Use fpic_CFLAGS and dso_LDFLAGS. 2017-07-26 Mark Wielaard <[email protected]> diff --git a/libdw/libdwP.h b/libdw/libdwP.h index 6ad322c1..78c00132 100644 --- a/libdw/libdwP.h +++ b/libdw/libdwP.h @@ -434,7 +434,7 @@ extern void *__libdw_allocate (Dwarf *dbg, size_t minsize, size_t align) __attribute__ ((__malloc__)) __nonnull_attribute__ (1); /* Default OOM handler. */ -extern void __libdw_oom (void) __attribute ((noreturn, visibility ("hidden"))); +extern void __libdw_oom (void) __attribute ((noreturn)) attribute_hidden; /* Allocate the internal data for a unit not seen before. */ extern struct Dwarf_CU *__libdw_intern_next_unit (Dwarf *dbg, bool debug_types) diff --git a/libdw/libdw_alloc.c b/libdw/libdw_alloc.c index 28a8cf6e..d6af23a2 100644 --- a/libdw/libdw_alloc.c +++ b/libdw/libdw_alloc.c @@ -70,7 +70,7 @@ dwarf_new_oom_handler (Dwarf *dbg, Dwarf_OOM handler) void -__attribute ((noreturn, visibility ("hidden"))) +__attribute ((noreturn)) attribute_hidden __libdw_oom (void) { while (1) diff --git a/libelf/ChangeLog b/libelf/ChangeLog index a0736467..9793d068 100644 --- a/libelf/ChangeLog +++ b/libelf/ChangeLog @@ -1,5 +1,9 @@ 2017-04-27 Ulf Hermann <[email protected]> + * libelfP.h: Use attribute_hidden. + +2017-04-27 Ulf Hermann <[email protected]> + * Makefile.am: Use fpic_CFLAGS and dso_LDFLAGS. 2017-08-15 Mark Wielaard <[email protected]> diff --git a/libelf/libelfP.h b/libelf/libelfP.h index 7ee6625a..a4a0a3a9 100644 --- a/libelf/libelfP.h +++ b/libelf/libelfP.h @@ -578,7 +578,7 @@ extern Elf_Data *__elf64_xlatetof_internal (Elf_Data *__dest, extern unsigned int __elf_version_internal (unsigned int __version) attribute_hidden; extern unsigned long int __elf_hash_internal (const char *__string) - __attribute__ ((__pure__, visibility ("hidden"))); + __attribute__ ((__pure__)) attribute_hidden; extern long int __elf32_checksum_internal (Elf *__elf) attribute_hidden; extern long int __elf64_checksum_internal (Elf *__elf) attribute_hidden; |