All MySQL programs compile cleanly for us with no warnings on
gcc. On other systems, warnings may occur due to
differences in system include files. See 4.9 Remarques sur MIT-pthreads, for warnings
that may occur when using MIT-pthreads. For other problems, check the list
The solution to many problems involves reconfiguring. If you do need to
reconfigure, take note of the following:
configure is run after it already has been run, it may use
information that was gathered during its previous invocation. This
information is stored in `config.cache'. When
up, it looks for that file and reads its contents if it exists, on the
assumption that the information is still correct. That assumption is invalid
when you reconfigure.
Each time you run
configure, you must run
to recompile. However, you may want to remove old object files from previous
builds first, since they were compiled using different configuration options.
To prevent old configuration information or object files from being used,
run these commands before rerunning
shell> rm config.cache
shell> make clean
Alternatively, you can run
The list below describes some of the problems compiling MySQL
that have been found to occur most often:
If you get errors when compiling `sql_yacc.cc' such as the ones shown
below, you have probably run out of memory or swap space:
Internal compiler error: program cc1plus got fatal signal 11
Out of virtual memory
Virtual memory exhausted
The problem is that
gcc requires huge amounts of memory to compile
`sql_yacc.cc' with inline functions. Try running
shell> ./configure --with-low-memory
This option causes
-fno-inline to be added to the compile line if you
-O0 if you are using something else. You
should try the
--with-low-memory option even if you have so much
memory and swap space that you think you can't possibly have run out. This
problem has been observed to occur even on systems with generous hardware
configurations, and the
--with-low-memory option usually fixes it.
c++ as the compiler name and
c++ links with
-lg++. If you are using
that behavior can cause problems during configuration such as this:
configure: error: installation or configuration problem:
C++ compiler cannot create executables.
You might also observe problems during compilation related to
One cause of these problems is that you may not have
g++, or you may
g++ but not
libstdc++. Take a look at
the `config.log' file. It should contain the exact reason why your c++
compiler didn't work! To work around these problems, you can use
as your C++ compiler. Try setting the environment variable
"gcc -O3". For example:
shell> CXX="gcc -O3" ./configure
This works because
gcc compiles C++ sources as well as
does, but does not link in
libstdc++ by default.
Another way to fix these problems, of course, is to install
If your compile fails with errors such as any of the following,
you must upgrade your version of
make to GNU
making all in mit-pthreads
make: Fatal error in reader: Makefile, line 18:
Badly formed macro assignment
make: file `Makefile' line 18: Must be a separator (:
pthread.h: No such file or directory
Solaris and FreeBSD are known to have troublesome
make version 3.75 is known to work.
If you want to define flags to be used by your C or C++ compilers, do so by
adding the flags to the
variables. You can also specify the compiler names this way using
CXX. For example:
shell> export CC CFLAGS CXX CXXFLAGS
See 4.14 TcX, for a list of flag definitions that have been found
to be useful on various systems.
If you get an error message like this,
you need to upgrade your
client/libmysql.c:273: parse error before `__attribute__'
gcc 2.8.1 is known to work, but we recommend using
1.0.3a or newer instead.
If you get errors such as those shown below when compiling
configure didn't correctly detect the type of the last argument to
cxx: Error: mysqld.cc, line 645: In this statement, the referenced
type of the pointer value "&length" is "unsigned long", which
is not compatible with "int".
new_sock = accept(sock, (struct sockaddr *)&cAddr, &length);
To fix this, edit the `config.h' file (which is generated by
configure). Look for these lines:
/* Define as the base type of the last arg to accept */
#define SOCKET_SIZE_TYPE XXX
int, depending on your
operating system. (Note that you will have to do this each time you run
configure regenerates `config.h'.)
The `sql_yacc.cc' file is generated from `sql_yacc.yy'. Normally
the build process doesn't need to create `sql_yacc.cc', because
MySQL comes with an already-generated copy. However, if you do need
to recreate it, you might encounter this error:
"sql_yacc.yy", line xxx fatal: default action causes potential...
This is a sign that your version of
yacc is deficient.
You probably need to install
bison (the GNU version of
and use that instead.
If you need to debug
mysqld or a MySQL client, run
configure with the
--with-debug option, then recompile and
link your clients with the new client library.
G.2 Debugguer un client MySQL.