lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | include(CheckCSourceCompiles) |
| 2 | |
| 3 | option(CURL_HIDDEN_SYMBOLS "Set to ON to hide libcurl internal symbols (=hide all symbols that aren't officially external)." ON) |
| 4 | mark_as_advanced(CURL_HIDDEN_SYMBOLS) |
| 5 | |
| 6 | if(CURL_HIDDEN_SYMBOLS) |
| 7 | set(SUPPORTS_SYMBOL_HIDING FALSE) |
| 8 | |
| 9 | if(CMAKE_C_COMPILER_ID MATCHES "Clang") |
| 10 | set(SUPPORTS_SYMBOL_HIDING TRUE) |
| 11 | set(_SYMBOL_EXTERN "__attribute__ ((__visibility__ (\"default\")))") |
| 12 | set(_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden") |
| 13 | elseif(CMAKE_COMPILER_IS_GNUCC) |
| 14 | if(NOT CMAKE_VERSION VERSION_LESS 2.8.10) |
| 15 | set(GCC_VERSION ${CMAKE_C_COMPILER_VERSION}) |
| 16 | else() |
| 17 | execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion |
| 18 | OUTPUT_VARIABLE GCC_VERSION) |
| 19 | endif() |
| 20 | if(NOT GCC_VERSION VERSION_LESS 3.4) |
| 21 | # note: this is considered buggy prior to 4.0 but the autotools don't care, so let's ignore that fact |
| 22 | set(SUPPORTS_SYMBOL_HIDING TRUE) |
| 23 | set(_SYMBOL_EXTERN "__attribute__ ((__visibility__ (\"default\")))") |
| 24 | set(_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden") |
| 25 | endif() |
| 26 | elseif(CMAKE_C_COMPILER_ID MATCHES "SunPro" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 8.0) |
| 27 | set(SUPPORTS_SYMBOL_HIDING TRUE) |
| 28 | set(_SYMBOL_EXTERN "__global") |
| 29 | set(_CFLAG_SYMBOLS_HIDE "-xldscope=hidden") |
| 30 | elseif(CMAKE_C_COMPILER_ID MATCHES "Intel" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 9.0) |
| 31 | # note: this should probably just check for version 9.1.045 but I'm not 100% sure |
| 32 | # so let's to it the same way autotools do. |
| 33 | set(SUPPORTS_SYMBOL_HIDING TRUE) |
| 34 | set(_SYMBOL_EXTERN "__attribute__ ((__visibility__ (\"default\")))") |
| 35 | set(_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden") |
| 36 | check_c_source_compiles("#include <stdio.h> |
| 37 | int main (void) { printf(\"icc fvisibility bug test\"); return 0; }" _no_bug) |
| 38 | if(NOT _no_bug) |
| 39 | set(SUPPORTS_SYMBOL_HIDING FALSE) |
| 40 | set(_SYMBOL_EXTERN "") |
| 41 | set(_CFLAG_SYMBOLS_HIDE "") |
| 42 | endif() |
| 43 | elseif(MSVC) |
| 44 | set(SUPPORTS_SYMBOL_HIDING TRUE) |
| 45 | endif() |
| 46 | |
| 47 | set(HIDES_CURL_PRIVATE_SYMBOLS ${SUPPORTS_SYMBOL_HIDING}) |
| 48 | elseif(MSVC) |
| 49 | if(NOT CMAKE_VERSION VERSION_LESS 3.7) |
| 50 | set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE) #present since 3.4.3 but broken |
| 51 | set(HIDES_CURL_PRIVATE_SYMBOLS FALSE) |
| 52 | else() |
| 53 | message(WARNING "Hiding private symbols regardless CURL_HIDDEN_SYMBOLS being disabled.") |
| 54 | set(HIDES_CURL_PRIVATE_SYMBOLS TRUE) |
| 55 | endif() |
| 56 | elseif() |
| 57 | set(HIDES_CURL_PRIVATE_SYMBOLS FALSE) |
| 58 | endif() |
| 59 | |
| 60 | set(CURL_CFLAG_SYMBOLS_HIDE ${_CFLAG_SYMBOLS_HIDE}) |
| 61 | set(CURL_EXTERN_SYMBOL ${_SYMBOL_EXTERN}) |