diff options
author | fanquake <fanquake@gmail.com> | 2019-12-12 08:09:43 -0500 |
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committer | fanquake <fanquake@gmail.com> | 2019-12-31 21:58:00 +0300 |
commit | f7453dcc0386a4a1162ced1a490c096afa13178a (patch) | |
tree | ddc3ff0e7958c5995ea67359ea4a3a13f7a85734 /configure.ac | |
parent | 35fff5be60e853455abc24713481544e91adfedb (diff) |
build: remove linking librt for backwards compatibility
Now that we require glibc 2.17+, #17538, we can remove linking in librt
for backwards compatibility purposes. The clock_* functions from librt
were merged into glibc as part of the 2.17 release.
* The `clock_*' suite of functions (declared in <time.h>) is now available
directly in the main C library. Previously it was necessary to link with
-lrt to use these functions. This change has the effect that a
single-threaded program that uses a function such as `clock_gettime' (and
is not linked with -lrt) will no longer implicitly load the pthreads
library at runtime and so will not suffer the overheads associated with
multi-thread support in other code such as the C++ runtime library.
https://sourceware.org/ml/libc-announce/2012/msg00001.html
Note that librt is already not linked by the RISC-V and AARCH64 binaries.
Diffstat (limited to 'configure.ac')
-rw-r--r-- | configure.ac | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/configure.ac b/configure.ac index 875491fb99..f28c2760cb 100644 --- a/configure.ac +++ b/configure.ac @@ -693,10 +693,6 @@ AX_GCC_FUNC_ATTRIBUTE([dllimport]) if test x$use_glibc_compat != xno; then - dnl glibc absorbed clock_gettime in 2.17. librt (its previous location) is safe to link - dnl in anyway for back-compat. - AC_CHECK_LIB([rt],[clock_gettime],, AC_MSG_ERROR(librt missing)) - dnl __fdelt_chk's params and return type have changed from long unsigned int to long int. dnl See which one is present here. AC_MSG_CHECKING(__fdelt_chk type) |