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Fix failure when CFLAGS contains -DNDEBUG (Bug 25251)
Building tests with -DNDEBUG in CFLAGS, gcc 9.2.1 issues the following error: tst-assert-c++.cc: In function ‘int do_test()’: tst-assert-c++.cc:66:12: error: unused variable ‘value’ [-Werror=unused-variable] 66 | no_int value; | ^~~~~ tst-assert-c++.cc:71:18: error: unused variable ‘value’ [-Werror=unused-variable] 71 | bool_and_int value; | ^~~~~ The assert has been disabled by building glibc with CFLAGS, CXXFLAGS, and CPPFLAGS with -DNDEBUG which removes the assert and leaves the value unused. We never want the assert disabled because that's the point of the test, so we undefine NDEBUG before including assert.h to ensure that we get assert correctly defined.
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@ -16,6 +16,9 @@
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* Undefine NDEBUG to ensure the build system e.g. CFLAGS/CXXFLAGS
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does not disable the asserts we want to test. */
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#undef NDEBUG
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#include <assert.h>
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/* The C++ standard requires that if the assert argument is a constant
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