How to compile FastCGI library

The simple answer, as usual is ./configure; make; make install …
… Well not in this case: it will break in some environments (mine is x86_64-linux with gcc 4.4.5 and fcgi >= 2.4.0).

During the make command, you will likely fall into the following errors. Here is how to get rid of them:

1. First error: a missing object file to be moved

   make  all-recursive
   make[1]: Entering directory `/homez.160/ultimact/jicmail1/fcgi-2.4.0'
   Making all in libfcgi
   make[2]: Entering directory `/homez.160/ultimact/jicmail1/fcgi-2.4.0/libfcgi'
   source='fcgiapp.c' object='libfcgi_la-fcgiapp.lo' libtool=yes \
           depfile='.deps/libfcgi_la-fcgiapp.Plo' tmpdepfile='.deps/libfcgi_la-fcgiapp.TPlo' \
           depmode=gcc3 /bin/sh ../depcomp \
           /bin/sh ../libtool --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I..   -I../include -pthread -g -O2 -Wall -c -o libfcgi_la-fcgiapp.lo `test -f fcgiapp.c || echo './'`fcgiapp.c
   rm -f .libs/libfcgi_la-fcgiapp.lo
   gcc -DHAVE_CONFIG_H -I. -I. -I.. -I../include -pthread -g -O2 -Wall -c fcgiapp.c -MT libfcgi_la-fcgiapp.lo -MD -MP -MF .deps/libfcgi_la-fcgiapp.TPlo  -fPIC -DPIC
   fcgiapp.c: In function 'ProcessManagementRecord':
   fcgiapp.c:1490: warning: dereferencing type-punned pointer will break strict-aliasing rules
   fcgiapp.c:1495: warning: dereferencing type-punned pointer will break strict-aliasing rules
   fcgiapp.c:1498: warning: dereferencing type-punned pointer will break strict-aliasing rules
   mv -f libfcgi_la-fcgiapp.o .libs/libfcgi_la-fcgiapp.lo
   mv: cannot stat `libfcgi_la-fcgiapp.o': No such file or directory
   make[2]: *** [libfcgi_la-fcgiapp.lo] Error 1
   make[2]: Leaving directory `/homez.160/ultimact/jicmail1/fcgi-2.4.0/libfcgi'
   make[1]: *** [all-recursive] Error 1
   make[1]: Leaving directory `/homez.160/ultimact/jicmail1/fcgi-2.4.0'
   make: *** [all] Error 2
   

   This may be due to a buggy version of libtool shipped with FastCGI.
   I don’t have a clean fix for this, but I have a very simple (yet dirty) work-around. Just have to add a make command at line 867 of the libtool file:

         # Just move the object if needed, then go on to compile the next one
         if test x"$output_obj" != x"$libobj"; then
           make $output_obj
           $show "$mv $output_obj $libobj"
           if $run $mv $output_obj $libobj; then :
           else
             error=$?
             $run $rm $removelist
             exit $error
           fi
         fi
   

2. Second error: an undeclared symbol

   fcgio.cpp: In destructor 'virtual fcgi_streambuf::~fcgi_streambuf()':
   fcgio.cpp:50: error: 'EOF' was not declared in this scope
   fcgio.cpp: In member function 'virtual int fcgi_streambuf::overflow(int)':
   fcgio.cpp:70: error: 'EOF' was not declared in this scope
   fcgio.cpp:75: error: 'EOF' was not declared in this scope
   fcgio.cpp: In member function 'virtual int fcgi_streambuf::sync()':
   fcgio.cpp:86: error: 'EOF' was not declared in this scope
   fcgio.cpp:87: error: 'EOF' was not declared in this scope
   fcgio.cpp: In member function 'virtual int fcgi_streambuf::underflow()':
   fcgio.cpp:107: error: 'EOF' was not declared in this scope
   make[2]: *** [fcgio.lo] Error 1
   make[2]: Leaving directory `/somepath/fcgi-2.4.0/libfcgi'
   make[1]: *** [all-recursive] Error 1
   make[1]: Leaving directory `/somepath/fcgi-2.4.0'
   make: *** [all] Error 2
   

   This is due to a missing stdio.h include in the file libfcgi/fcgio.cpp. Just add it yourself.

   #ifdef _WIN32
   #define DLLAPI  __declspec(dllexport)
   #endif
   
   #include <stdio.h>
   #include <limits.h>
   #include "fcgio.h"
   
   using std::streambuf;
   using std::istream;
   using std::ostream;
   using std::streamsize;
   

These are the 2 errors that prevented me from compiling and linking FastCGI on my Linux system.

Hope it will avoid headaches to others.