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comparison mupdf-source/thirdparty/curl/CMake/CurlSymbolHiding.cmake @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
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 do 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 else()
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})