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CMake: give up on Clang on Haiku.

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Haiku bug 18258 makes it too painful to beat the configuration process
into submission.
This commit is contained in:
Guy Harris 2023-02-12 16:03:09 -08:00
parent f37c5e5639
commit 21f46b9600
1 changed files with 14 additions and 17 deletions
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31
CMakeLists.txt
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@ -115,6 +115,20 @@ set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
# C++ code in tcpdump.
#
project(tcpdump C)
if(CMAKE_SYSTEM_NAME STREQUAL "Haiku")
#
# Due to Haiku bug 18258, it is difficult if not impossible
# to get Clang to be usable as a compiler for CMake projects.
#
# If CMAKE_SIZEOF_VOID_P is undefined, we assume that means
# that the attempt to determine the compiler ABI failed, due
# the the consequences of that bug, and tell the user that
# this compiler doesn't work wel with CMake on Haiku
#
if(NOT CMAKE_SIZEOF_VOID_P)
message(FATAL_ERROR "${CMAKE_C_COMPILER} does not work well on Haiku for projects using CMake")
endif()
endif()
#
# For checking if a compiler flag works and adding it if it does.
@ -278,23 +292,6 @@ if(MSVC)
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
endif(MSVC)
if(CMAKE_SYSTEM_NAME STREQUAL "Haiku")
#
# On Haiku, all executables are built as shared objects,
# and must have their code build as PIC.
#
# At least some versions of Haiku's GCC default to PIC,
# with a -fno-pic option for cases where that's not desired.
#
# Clang hasn't been modified in that fashion, so Clang
# builds of tcpdump fail.
#
# Force the use of -fPIC (even for GCC; adding -fPIC for GCC
# won't break anything).
#
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
endif(CMAKE_SYSTEM_NAME STREQUAL "Haiku")
if(MSVC)
if (USE_STATIC_RT)
MESSAGE(STATUS "Use STATIC runtime")