Revision: 75712
http://sourceforge.net/p/brlcad/code/75712
Author: starseeker
Date: 2020-05-06 23:34:47 +0000 (Wed, 06 May 2020)
Log Message:
-----------
Add an iostream C++ test for the POSIX_C_SOURCE and XOPEN_SOURCE definitions
for OpenBSD.
Modified Paths:
--------------
brlcad/trunk/CMakeLists.txt
Modified: brlcad/trunk/CMakeLists.txt
===================================================================
--- brlcad/trunk/CMakeLists.txt 2020-05-06 23:04:29 UTC (rev 75711)
+++ brlcad/trunk/CMakeLists.txt 2020-05-06 23:34:47 UTC (rev 75712)
@@ -897,9 +897,36 @@
endif(NOT DEFINED CMAKE_CXX_FLAGS_DEFAULT)
mark_as_advanced(CMAKE_CXX_FLAGS_DEFAULT)
-# TODO - OpenBSD 6.6 doesn't tolerate these flags when using #include
<iostream>
-set(API_FLAGS "-D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700")
+# OpenBSD 6.6 doesn't tolerate these flags when using #include <iostream>,
+# so we have to test
+include(CheckCXXSourceRuns)
+include(CMakePushCheckState)
+function(BRLCAD_API_FLAG AFLAG AFLAGS)
+ set(CHECK_API_FLAG_SRC "
+#include <iostream>
+int main(int ac, char *av[])
+{
+ if (ac > 0 && av)
+ std::cout << \"hello\";
+ return 0;
+}
+")
+ string(TOUPPER "${AFLAG}" UAFLAG)
+ string(REPLACE "-" "_" AFLAGVAR "${UAFLAG}")
+ string(REPLACE "=" "_" AFLAGVAR "${AFLAGVAR}")
+ cmake_push_check_state()
+ set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${C_STANDARD_FLAGS}
${AFLAG}")
+ check_cxx_source_runs("${CHECK_API_FLAG_SRC}" WORKING_${AFLAGVAR})
+ cmake_pop_check_state()
+ if(WORKING_${AFLAGVAR})
+ set(${AFLAGS} "${${AFLAGS}} ${AFLAG}" PARENT_SCOPE)
+ endif(WORKING_${AFLAGVAR})
+endfunction(BRLCAD_API_FLAG)
+set(API_FLAGS)
+BRLCAD_API_FLAG("-D_POSIX_C_SOURCE=200809L" API_FLAGS)
+BRLCAD_API_FLAG("-D_XOPEN_SOURCE=700" API_FLAGS)
+
# C
unset(C_STANDARD_FLAGS)
set(CMAKE_C_EXTENSIONS OFF)
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