about summary refs log tree commit diff
path: root/include
diff options
context:
space:
mode:
authorFlorian Weimer <fweimer@redhat.com>2021-07-12 18:43:32 +0200
committerFlorian Weimer <fweimer@redhat.com>2021-07-12 18:43:32 +0200
commitaaacde11f2e814814fdd19dfb683e76f1dede4d5 (patch)
tree6521bf547f60de04b02c84e542e87daccb4636e9 /include
parent8235f9311bddbe4cf8ff1fa8f72f41aa77e27e00 (diff)
downloadglibc-aaacde11f2e814814fdd19dfb683e76f1dede4d5.tar.gz
glibc-aaacde11f2e814814fdd19dfb683e76f1dede4d5.tar.xz
glibc-aaacde11f2e814814fdd19dfb683e76f1dede4d5.zip
Reduce <limits.h> pollution due to dynamic PTHREAD_STACK_MIN
<limits.h> used to be a header file with no declarations.
GCC's libgomp includes it in a #pragma GCC visibility hidden block.
Including <unistd.h> from <limits.h> (indirectly) declares everything
in <unistd.h> with hidden visibility, resulting in linker failures.

This commit avoids C declarations in assembler mode and only declares
__sysconf in <limits.h> (and not the entire contents of <unistd.h>).
The __sysconf symbol is already part of the ABI.  PTHREAD_STACK_MIN
is no longer defined for __USE_DYNAMIC_STACK_SIZE && __ASSEMBLER__
because there is no possible definition.

Additionally, PTHREAD_STACK_MIN is now defined by <pthread.h> for
__USE_MISC because this is what developers expect based on the macro
name.  It also helps to avoid libgomp linker failures in GCC because
libgomp includes <pthread.h> before its visibility hacks.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/bits/local_lim.h7
1 files changed, 0 insertions, 7 deletions
diff --git a/include/bits/local_lim.h b/include/bits/local_lim.h
deleted file mode 100644
index 46d82dc729..0000000000
--- a/include/bits/local_lim.h
+++ /dev/null
@@ -1,7 +0,0 @@
-/* Don't define PTHREAD_STACK_MIN to sysconf (_SC_THREAD_STACK_MIN) for
-   glibc build.  */
-#if !defined _ISOMAC
-# undef __USE_DYNAMIC_STACK_SIZE
-#endif
-
-#include_next <bits/local_lim.h>