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build: Support platforms without symbol versioning

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The .symver directive is ELF-specific. On non-ELF platforms, work around
this with __attribute__((__alias__)) for the default symbol, and ignore
the variant versioned symbols.

Based-on-patch-by: Aaron Dierking <aarond@fb.com>
Signed-off-by: Guillem Jover <guillem@hadrons.org>
This commit is contained in:
Guillem Jover 2019-08-06 19:14:29 +02:00
parent 890699a78b
commit 2e071c3cc1
1 changed files with 7 additions and 0 deletions
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7
src/local-link.h
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@ -31,10 +31,17 @@
static const char libbsd_emit_link_warning_##symbol[] \ static const char libbsd_emit_link_warning_##symbol[] \
__attribute__((__used__,__section__(".gnu.warning." #symbol))) = msg; __attribute__((__used__,__section__(".gnu.warning." #symbol))) = msg;
#ifdef __ELF__
#define libbsd_symver_default(alias, symbol, version) \ #define libbsd_symver_default(alias, symbol, version) \
__asm__(".symver " #symbol "," #alias "@@" #version) __asm__(".symver " #symbol "," #alias "@@" #version)
#define libbsd_symver_variant(alias, symbol, version) \ #define libbsd_symver_variant(alias, symbol, version) \
__asm__(".symver " #symbol "," #alias "@" #version) __asm__(".symver " #symbol "," #alias "@" #version)
#else
#define libbsd_symver_default(alias, symbol, version) \
extern __typeof(symbol) alias __attribute__((__alias__(#symbol)))
#define libbsd_symver_variant(alias, symbol, version)
#endif
#endif #endif