On 4/22/20 1:40 PM, Victor Eijkhout wrote:
Cmake outputs this:
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
So your cmake configuration must be looking for pthread*s* and then
misremembering the conclusion.
Maybe. But maybe also not. We never actually check for pthread_create in our
own configuration. We do call this piece of code in
cmake/configure/configure_1_threads.cmake:
MACRO(SETUP_THREADING)
#
# Unfortunately the FindThreads macro needs a working C compiler
#
IF(CMAKE_C_COMPILER_WORKS)
#
# Clear the test flags because FindThreads.cmake will use a C compiler:
#
CLEAR_CMAKE_REQUIRED()
SWITCH_LIBRARY_PREFERENCE()
FIND_PACKAGE(Threads) <<<<<<<<<<<<<<<<<<
SWITCH_LIBRARY_PREFERENCE()
FIND_PACKAGE(Threads) calls a cmake-builtin module that on my system lives in
/usr/share/cmake/Modules/FindThreads.cmake. It contains this piece of code:
_check_threads_lib(pthreads pthread_create CMAKE_HAVE_PTHREADS_CREATE)
_check_threads_lib(pthread pthread_create CMAKE_HAVE_PTHREAD_CREATE)
It must be somewhere in this module that -lpthreads is added to the link line,
though I have no idea why that would be given that the check fails (as shown
above).
What's your version of cmake?
@tamiko: Any ideas?
Best
W.
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