During the review of the fix for https://bugs.openjdk.org/browse/JDK-8324668, in the PR, there was a suggestion that one of the include statements in a c file be reordered https://github.com/openjdk/jdk/pull/17588#discussion_r1472358835.

However, reordering that include, causes compilation failures as noted in the subsequent comment there. Specifically, that leads to:

In file included from /jdk/src/jdk.jdwp.agent/unix/native/libjdwp/exec_md.c:33:
/jdk/src/jdk.jdwp.agent/share/native/libjdwp/error_messages.h:35:20: error: unknown type name 'FILE'
void print_message(FILE *fp, const char *prefix, const char *suffix,
                   ^
/jdk/src/jdk.jdwp.agent/share/native/libjdwp/error_messages.h:41:29: error: a parameter list without types is only allowed in a function definition
const char * jvmtiErrorText(jvmtiError);
                            ^
/jdk/src/jdk.jdwp.agent/share/native/libjdwp/error_messages.h:43:28: error: a parameter list without types is only allowed in a function definition
const char * jdwpErrorText(jdwpError);
                           ^
3 errors generated.

I think this is because some of these header files aren't explicitly listing the necessary includes for some of the types they use.