diff options
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index f8cee71c..0abf1df7 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -551,6 +551,49 @@ else() message(STATUS "Unknown architecture") endif() +# clock_gettime came in POSIX.1b (1993) +# CLOCK_MONOTONIC came in POSIX.1-2001 / SUSv3 as optional +# posix_memalign came in POSIX.1-2001 / SUSv3 +# M_PI is an XSI extension since POSIX.1-2001 / SUSv3, came in XPG1 (1985) +add_compile_definitions(_XOPEN_SOURCE=600) + +# Somehow in OpenBSD whenever POSIX conformance is specified +# some string functions rely on locale_t availability, +# which was introduced in POSIX.1-2008, forcing us to go higher +IF (CMAKE_SYSTEM_NAME MATCHES "OpenBSD") + remove_definitions(-D_XOPEN_SOURCE=600) + add_compile_definitions(_XOPEN_SOURCE=700) +ENDIF() + +# Data types, macros and functions related to controlling CPU affinity and +# some memory allocation are available on Linux through GNU extensions in libc +IF (CMAKE_SYSTEM_NAME MATCHES "Linux") + add_compile_definitions(_GNU_SOURCE) +ENDIF() + +# RLIMIT_MEMLOCK came in BSD, is not specified in POSIX.1, +# and on macOS its availability depends on enabling Darwin extensions +# similarly on DragonFly, enabling BSD extensions is necessary +IF (CMAKE_SYSTEM_NAME MATCHES "Darwin") + add_compile_definitions(_DARWIN_C_SOURCE) +ENDIF() +IF (CMAKE_SYSTEM_NAME MATCHES "DragonFly") + add_compile_definitions(_DARWIN_C_SOURCE) +ENDIF() + +# alloca is a non-standard interface that is not visible on BSDs when +# POSIX conformance is specified, but not all of them provide a clean way +# to enable it in such cases +IF (CMAKE_SYSTEM_NAME MATCHES "FreeBSD") + add_compile_definitions(__BSD_VISIBLE) +ENDIF() +IF (CMAKE_SYSTEM_NAME MATCHES "NetBSD") + add_compile_definitions(_NETBSD_SOURCE) +ENDIF() +IF (CMAKE_SYSTEM_NAME MATCHES "OpenBSD") + add_compile_definitions(_BSD_SOURCE) +ENDIF() + # # libraries # |