The following issue has been SUBMITTED.
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http://public.kitware.com/Bug/view.php?id=15359
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Reported By: Laurent Demailly
Assigned To:
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Project: CMake
Issue ID: 15359
Category: CMake
Reproducibility: always
Severity: feature
Priority: normal
Status: new
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Date Submitted: 2015-01-19 16:39 EST
Last Modified: 2015-01-19 16:39 EST
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Summary: __attribute__((weak)) support/detection (weak
symbols)
Description:
it would be great if some built in recipe would set some variable depending on
whether the
compiler/linker support __attribute__((weak))
this is done in autoconf the following way for instance:
AC_CACHE_CHECK(
[for weak symbol support],
[folly_cv_prog_cc_weak_symbols],
[AC_LINK_IFELSE(
[AC_LANG_SOURCE[
extern "C" void configure_link_extern_weak_test()
__attribute__((weak));
int main(int argc, char** argv) {
return configure_link_extern_weak_test == nullptr;
}]],
[folly_cv_prog_cc_weak_symbols="yes"],
[folly_cv_prog_cc_weak_symbols="no"])])
if test "$folly_cv_prog_cc_weak_symbols" = yes; then
AC_DEFINE([HAVE_WEAK_SYMBOLS], [1],
[Define to 1 if the linker supports weak symbols.])
fi
ps: sent similar request (more of a question on how to do it pending built in
support by cmake base) to the [email protected] mailing list - hope it's ok to
have some amount of duplicate
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Issue History
Date Modified Username Field Change
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2015-01-19 16:39 Laurent DemaillyNew Issue
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