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| 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() |
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