Hi, While doing some build experiments, I found a compile failure with perf and jvmti:
BUILDSTDERR: gcc -Wp,-MD,./.xsk.o.d -Wp,-MT,xsk.o -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-jvmti/jvmti_agent.c:48:21: error: static declaration of 'gettid' follows non-static declaration BUILDSTDERR: 48 | static inline pid_t gettid(void) BUILDSTDERR: | ^~~~~~ BUILDSTDERR: In file included from /usr/include/unistd.h:1170, BUILDSTDERR: from jvmti/jvmti_agent.c:33: BUILDSTDERR: /usr/include/bits/unistd_ext.h:40:16: note: previous declaration of 'gettid' was here BUILDSTDERR: 40 | extern __pid_t gettid (void) __THROW; BUILDSTDERR: | ^~~~~~ This is with the newer glibc headers that came into Fedora earlier this week (glibc-2.29.9000-27.fc31) It looks like the newer headers now define gettid so the in file gettid no longer works. Note this was a custom build with jvmti enabled as regular Fedora doesn't have it enabled which is why this wasn't reported elsewhere. I don't know enough about either the glibc headers or perf to make a suggestion on how to fix this but I'm happy to test. Thanks, Laura
