From 1ef9b6e0bf1268050e74087c4f6bd056263a28c7 Mon Sep 17 00:00:00 2001 From: Tulio Magno Quites Machado Filho Date: Sun, 20 Oct 2019 16:00:30 -0500 Subject: Do not redirect calls to __GI_* symbols, when redirecting to *ieee128 On platforms where long double has IEEE binary128 format as a third option (initially, only powerpc64le), many exported functions are redirected to their __*ieee128 equivalents. This redirection is provided by installed headers such as stdio-ldbl.h, and is supposed to work correctly with user code. However, during the build of glibc, similar redirections are employed, in internal headers, such as include/stdio.h, in order to avoid extra PLT entries. These redirections conflict with the redirections to __*ieee128, and must be avoided during the build. This patch protects the second redirections with a test for __LONG_DOUBLE_USES_FLOAT128, a new macro that is defined to 1 when functions that deal with long double typed values reuses the _Float128 implementation (this is currently only true for powerpc64le). Tested for powerpc64le, x86_64, and with build-many-glibcs.py. Co-authored-by: Gabriel F. T. Gomes Reviewed-by: Florian Weimer --- include/stdlib.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/stdlib.h') diff --git a/include/stdlib.h b/include/stdlib.h index 114e12d255..1fab78aa16 100644 --- a/include/stdlib.h +++ b/include/stdlib.h @@ -202,9 +202,12 @@ libc_hidden_proto (____strtoll_l_internal) libc_hidden_proto (____strtoul_l_internal) libc_hidden_proto (____strtoull_l_internal) +#include libc_hidden_proto (strtof) libc_hidden_proto (strtod) +#if __LONG_DOUBLE_USES_FLOAT128 == 0 libc_hidden_proto (strtold) +#endif libc_hidden_proto (strtol) libc_hidden_proto (strtoll) libc_hidden_proto (strtoul) -- cgit v1.2.3