If you will try to compile nginx in Redhat Linux, you can get following error even if you have pcre-devel package installed:
+ threads are not used
+ PCRE library is not found
./configure: error: the HTTP rewrite module requires the PCRE library.
You can either disable the module by using --without-http_rewrite_module
option, or install the PCRE library into the system, or build the PCRE library
statically from the source with nginx by using --with-pcre=<path> option.
If you are experiencing this small problem, you should simply use following parameter of configure script:
# ./configure --with-cc-opt="-I /usr/include/pcre"
+ using system PCRE library
Now it can see and will use system PCRE library.