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# Copyright (c) 2020, 2025, Oracle and/or its affiliates.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2.0,
# as published by the Free Software Foundation.
#
# This program is designed to work with certain software (including
# but not limited to OpenSSL) that is licensed under separate terms,
# as designated in a particular file or component or in included license
# documentation. The authors of MySQL hereby grant you an additional
# permission to link the program and your derivative works with the
# separately licensed software that they have either included with
# the program or referenced in the documentation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License, version 2.0, for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
FUNCTION(WARN_MISSING_SYSTEM_TCMALLOC)
MESSAGE(WARNING "Cannot find tcmalloc development libraries. "
"You need to install the required packages:\n"
" Debian/Ubuntu: apt install libgoogle-perftools-dev\n"
" RedHat/Fedora/Oracle Linux: yum install gperftools-devel\n"
" SuSE: zypper install gperftools-devel\n"
)
ENDFUNCTION()
FUNCTION(WARN_MISSING_SYSTEM_JEMALLOC)
MESSAGE(WARNING "Cannot find jemalloc development libraries. "
"You need to install the required packages:\n"
" Debian/Ubuntu: apt install libjemalloc-dev\n"
" RedHat/Fedora/Oracle Linux: yum install jemalloc-devel\n"
" SuSE: zypper install jemalloc-devel\n"
)
ENDFUNCTION()
FUNCTION(FIND_MALLOC_LIBRARY library_name)
# Skip system tcmalloc, and build the bundled version instead.
IF(WITH_TCMALLOC STREQUAL "bundled")
RETURN()
ENDIF()
FIND_LIBRARY(MALLOC_LIBRARY ${library_name})
IF(NOT MALLOC_LIBRARY)
IF(library_name MATCHES "tcmalloc")
WARN_MISSING_SYSTEM_TCMALLOC()
ELSE()
WARN_MISSING_SYSTEM_JEMALLOC()
ENDIF()
MESSAGE(FATAL_ERROR "Library ${library_name} not found")
ENDIF()
# There are some special considerations when using the RedHat gcc toolsets:
# https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/
# html/developing_c_and_cpp_applications_in_rhel_8/
# additional-toolsets-for-development_developing-applications
#
# For mysqld (and possibly other binaries),
# we need tcmalloc to be the last library on the link line.
# Or more specifically:
# after any library that might pull in libstdc++_nonshared.a
# Cmake will analyze target dependencies, and will add -ltcmalloc
# somewhere on the compiler/linker command line accordingly.
# There is no way to tell cmake to "link this library last",
# so we modify CMAKE_CXX_LINK_EXECUTABLE instead.
# For the original contents of CMAKE_CXX_LINK_EXECUTABLE,
# see e.g. cmake-3.20.1/Modules/CMakeCXXInformation.cmake
SET(ORIGINAL_CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE}")
SET(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} -l${library_name}")
SET(ORIGINAL_CMAKE_CXX_LINK_EXECUTABLE "${ORIGINAL_CMAKE_CXX_LINK_EXECUTABLE}" PARENT_SCOPE)
SET(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE}" PARENT_SCOPE)
ENDFUNCTION()
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