CurlSymbolHiding.cmake (2991B)
1 #*************************************************************************** 2 # _ _ ____ _ 3 # Project ___| | | | _ \| | 4 # / __| | | | |_) | | 5 # | (__| |_| | _ <| |___ 6 # \___|\___/|_| \_\_____| 7 # 8 # Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 9 # 10 # This software is licensed as described in the file COPYING, which 11 # you should have received as part of this distribution. The terms 12 # are also available at https://curl.se/docs/copyright.html. 13 # 14 # You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 # copies of the Software, and permit persons to whom the Software is 16 # furnished to do so, under the terms of the COPYING file. 17 # 18 # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 # KIND, either express or implied. 20 # 21 # SPDX-License-Identifier: curl 22 # 23 ########################################################################### 24 option(CURL_HIDDEN_SYMBOLS "Hide libcurl internal symbols (=hide all symbols that are not officially external)" ON) 25 mark_as_advanced(CURL_HIDDEN_SYMBOLS) 26 27 if(WIN32 AND (ENABLE_DEBUG OR ENABLE_CURLDEBUG)) 28 # We need to export internal debug functions, 29 # e.g. curl_easy_perform_ev() or curl_dbg_*(), 30 # so disable symbol hiding for debug builds and for memory tracking. 31 set(CURL_HIDDEN_SYMBOLS OFF) 32 elseif(DOS OR AMIGA OR MINGW32CE) 33 set(CURL_HIDDEN_SYMBOLS OFF) 34 endif() 35 36 set(CURL_HIDES_PRIVATE_SYMBOLS FALSE) 37 set(CURL_EXTERN_SYMBOL "") 38 set(CURL_CFLAG_SYMBOLS_HIDE "") 39 40 if(CURL_HIDDEN_SYMBOLS) 41 if(CMAKE_C_COMPILER_ID MATCHES "Clang" AND NOT MSVC) 42 set(CURL_HIDES_PRIVATE_SYMBOLS TRUE) 43 set(CURL_EXTERN_SYMBOL "__attribute__((__visibility__(\"default\")))") 44 set(CURL_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden") 45 elseif(CMAKE_C_COMPILER_ID STREQUAL "GNU") 46 if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 3.4) 47 # Note: This is considered buggy prior to 4.0 but the autotools do not care, so let us ignore that fact 48 set(CURL_HIDES_PRIVATE_SYMBOLS TRUE) 49 set(CURL_EXTERN_SYMBOL "__attribute__((__visibility__(\"default\")))") 50 set(CURL_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden") 51 endif() 52 elseif(CMAKE_C_COMPILER_ID MATCHES "SunPro" AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 8.0) 53 set(CURL_HIDES_PRIVATE_SYMBOLS TRUE) 54 set(CURL_EXTERN_SYMBOL "__global") 55 set(CURL_CFLAG_SYMBOLS_HIDE "-xldscope=hidden") 56 elseif(CMAKE_C_COMPILER_ID MATCHES "Intel" AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 9.0) # Requires 9.1.045 57 set(CURL_HIDES_PRIVATE_SYMBOLS TRUE) 58 set(CURL_EXTERN_SYMBOL "__attribute__((__visibility__(\"default\")))") 59 set(CURL_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden") 60 elseif(MSVC) 61 set(CURL_HIDES_PRIVATE_SYMBOLS TRUE) 62 endif() 63 else() 64 if(MSVC) 65 # Note: This option is prone to export non-curl extra symbols. 66 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE) 67 endif() 68 endif()