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# Copyright (c) 2016, 2023, 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 also distributed 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 included with MySQL.
#
# 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
INCLUDE(CheckCSourceRuns)
INCLUDE(CheckCXXSourceRuns)
SET(SAVE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
SET(CMAKE_REQUIRED_FLAGS
"${CMAKE_REQUIRED_FLAGS} -O3 -fexpensive-optimizations"
)
# Below code is known to fail for GCC 5.3.0 on sparc solaris 11.
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67781
SET(code "
struct X
{
int i;
unsigned short s;
};
unsigned __attribute__((noinline)) f(struct X x)
{
return x.s | (x.i << 16);
}
int
main()
{
struct X x;
x.i = 0x00001234;
x.s = 0x5678;
unsigned y = f(x);
/* Succeed (return 0) if compiler have bug */
return y == 0x12345678 ? 1 : 0;
}
")
IF(CMAKE_COMPILER_IS_GNUCC)
CHECK_C_SOURCE_RUNS("${code}" HAVE_C_SHIFT_OR_OPTIMIZATION_BUG)
ENDIF()
IF(CMAKE_COMPILER_IS_GNUCXX)
CHECK_CXX_SOURCE_RUNS("${code}" HAVE_CXX_SHIFT_OR_OPTIMIZATION_BUG)
ENDIF()
SET(CMAKE_REQUIRED_FLAGS "${SAVE_CMAKE_REQUIRED_FLAGS}")