I've tested your change to src/aclocal.m4.  Unfortunately, it's not quite 
right.  I get the following error:

    cc: "prof_file.c", line 216: error 1621: Too few arguments for 
getpwuid_r.

while compiling src/util/profile/prof_file.c  I have traced the cause to 
"#define GETPWUID_R_4_ARGS 1" turning up in src/include/autoconf.h where 
previously there was a commented out undef statement.  The reason for this 
is that when src/include/configure tested the number of arguments for 
getpwuid_r, it failed to use the PTHREAD_CFLAGS options.

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