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#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <[email protected]>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
option(CURL_HIDDEN_SYMBOLS "Hide libcurl internal symbols (=hide all symbols that are not officially external)" ON)
mark_as_advanced(CURL_HIDDEN_SYMBOLS)
if(WIN32 AND (ENABLE_DEBUG OR ENABLE_CURLDEBUG))
# We need to export internal debug functions,
# e.g. curl_easy_perform_ev() or curl_dbg_*(),
# so disable symbol hiding for debug builds and for memory tracking.
set(CURL_HIDDEN_SYMBOLS OFF)
endif()
set(CURL_HIDES_PRIVATE_SYMBOLS FALSE)
unset(CURL_EXTERN_SYMBOL)
unset(CURL_CFLAG_SYMBOLS_HIDE)
if(CURL_HIDDEN_SYMBOLS)
if(CMAKE_C_COMPILER_ID MATCHES "Clang" AND NOT MSVC)
set(CURL_HIDES_PRIVATE_SYMBOLS TRUE)
set(CURL_EXTERN_SYMBOL "__attribute__((__visibility__(\"default\")))")
set(CURL_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden")
elseif(CMAKE_COMPILER_IS_GNUCC)
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
# Note: This is considered buggy prior to 4.0 but the autotools do not care, so let us ignore that fact
set(CURL_HIDES_PRIVATE_SYMBOLS TRUE)
set(CURL_EXTERN_SYMBOL "__attribute__((__visibility__(\"default\")))")
set(CURL_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden")
endif()
elseif(CMAKE_C_COMPILER_ID MATCHES "SunPro" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 8.0)
set(CURL_HIDES_PRIVATE_SYMBOLS TRUE)
set(CURL_EXTERN_SYMBOL "__global")
set(CURL_CFLAG_SYMBOLS_HIDE "-xldscope=hidden")
elseif(CMAKE_C_COMPILER_ID MATCHES "Intel" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 9.0) # Requires 9.1.045
set(CURL_HIDES_PRIVATE_SYMBOLS TRUE)
set(CURL_EXTERN_SYMBOL "__attribute__((__visibility__(\"default\")))")
set(CURL_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden")
elseif(MSVC)
set(CURL_HIDES_PRIVATE_SYMBOLS TRUE)
endif()
else()
if(MSVC)
# Note: This option is prone to export non-curl extra symbols.
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
endif()
endif()
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