Building linux x86 now gets an error:

```
* For target support_test_hotspot_jtreg_native_support_libNoClassDefFoundErrorTest_libNoClassDefFoundErrorTest.o:
In file included from /usr/include/string.h:495,
                 from /shared/projects/openjdk/jdk-jdk/source/test/hotspot/jtreg/runtime/exceptionMsgs/NoClassDefFoundError/libNoClassDefFoundErrorTest.c:27:
In function ‘memset’,
    inlined from ‘giant_string’ at /shared/projects/openjdk/jdk-jdk/source/test/hotspot/jtreg/runtime/exceptionMsgs/NoClassDefFoundError/libNoClassDefFoundErrorTest.c:53:9,
    inlined from ‘Java_NoClassDefFoundErrorTest_tryCallDefineClass’ at /shared/projects/openjdk/jdk-jdk/source/test/hotspot/jtreg/runtime/exceptionMsgs/NoClassDefFoundError/libNoClassDefFoundErrorTest.c:61:20:
/usr/include/i386-linux-gnu/bits/string_fortified.h:71:10: error: ‘__builtin_memset’ writing 18446744071562067969 bytes into a region of size 2147483650 [-Werror=stringop-overflow=]
   71 | return __builtin___memset_chk (__dest, __ch, __len, __bos0 (__dest));
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/shared/projects/openjdk/jdk-jdk/source/test/hotspot/jtreg/runtime/exceptionMsgs/NoClassDefFoundError/libNoClassDefFoundErrorTest.c: In function ‘Java_NoClassDefFoundErrorTest_tryCallDefineClass’:
/shared/projects/openjdk/jdk-jdk/source/test/hotspot/jtreg/runtime/exceptionMsgs/NoClassDefFoundError/libNoClassDefFoundErrorTest.c:51:20: note: at offset 0 to an object with size 2147483650 allocated by ‘malloc’ here
   51 | char* c_name = malloc(len * sizeof(char));
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘giant_string’,
    inlined from ‘Java_NoClassDefFoundErrorTest_tryCallDefineClass’ at /shared/projects/openjdk/jdk-jdk/source/test/hotspot/jtreg/runtime/exceptionMsgs/NoClassDefFoundError/libNoClassDefFoundErrorTest.c:61:20:
/shared/projects/openjdk/jdk-jdk/source/test/hotspot/jtreg/runtime/exceptionMsgs/NoClassDefFoundError/libNoClassDefFoundErrorTest.c:54:25: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
   ... (rest of output omitted)
```

My configure line:

```
--with-boot-jdk=/shared/projects/openjdk/jdks/sapmachine22 --with-gtest=/shared/projects/openjdk/gtest/googletest-1.14.0 --with-debug-level=fastdebug --with-native-debug-symbols=internal -with-extra-cxxflags=-fno-omit-frame-pointer -with-extra-cflags=-fno-omit-frame-pointer --with-target-bits=32 --disable-precompiled-headers
```

----

At first glance, the warning seems to be bogus. I have yet to see a GCC fortify message that makes sense :-|

A workaround would be to just disable this coding for 32-bits, since the test is only run for 64 bit anyway.

============

Update: JDK-8338888 broke the build originally, but at least JDK-8339307 also broke the build afterward (since nobody builds), so this issue is now about fixing all these issues.