CentOS4 and gcc4

Say you are merrily compiling someone else's code on CentOS4 and you get something resembling the following:

query_response_time.cc: In function `void query_response_time::add_time_atomic(query_response_time::TimeCounter*, uint64)':

query_response_time.cc:160: error: `__sync_fetch_and_add' was not declared in this scope

query_response_time.cc: In member function `void query_response_time::time_collector::collect(uint64)':

query_response_time.cc:261: error: `__sync_fetch_and_add' was not declared in this scope

make[3]: *** [query_response_time.o] Error 1

make[3]: *** Waiting for unfinished jobs....

make[3]: Leaving directory /usr/src/redhat/BUILD/Percona-Server/sql'

make[2]: *** [all-recursive] Error 1

make[2]: Leaving directory /usr/src/redhat/BUILD/Percona-Server/sql'

make[1]: *** [all] Error 2

make[1]: Leaving directory /usr/src/redhat/BUILD/Percona-Server/sql'

make: *** [all-recursive] Error 1

error: Bad exit status from /var/tmp/rpm-tmp.49946 (%build)

You curse and swear. __sync_fetch_and_add is part of Intel's Itanium ABI and just plain isn't implemented in GCC 3, the default compiler in CentOS 4.

But the solution is easier then you think:

yum install gcc4 gcc4-c++

export CC=gcc4 CXX=c++4

OK, so maybe it's harder then that; you will probably have to add the following to your spec file:

BuildRequires: gcc4 gcc4-c++

%define cc_cmd ${CC:-gcc4}

%define cxx_cmd ${CCX:-g++4}

And replace any hardcoded reference to gcc or c++ with %{cc_cmd} or %{cxx_cmd}.