bigloo doesn't recognise CFLAGS or CPPFLAGS

[Honeymonster]

when trying to include an alternative directory for header files (such as $HOME/test/include in my case for fastcgi), bigloo ignores the set CFLAGS and CPPFLAGS

commandline:
LD_LIBRARY_PATH="`pwd`/libs:$HOME/test/lib" LDFLAGS="-L$HOME/test/lib" CPPFLAGS="-I$HOME/test/include" CFLAGS="-I$HOME/test/include" ./configure --prefix=$HOME/test &&
LD_LIBRARY_PATH="`pwd`/libs:$HOME/test/lib" LDFLAGS="-L$HOME/test/lib" CPPFLAGS="-I$HOME/test/include" CFLAGS="-I$HOME/test/include" make

make[2]: Leaving directory `/home/daniel/roadsend-php-2.9.4/webconnect/micro'
making web backend fastcgi ...
make[2]: Entering directory `/home/daniel/roadsend-php-2.9.4/webconnect/fastcgi'
bigloo -mkaddlib -unsafev -copt -DPCC_LINUX -srfi PCC_LINUX -O3  -L ../../libs -copt -I/usr/local/include -copt -I../../../include  -copt -L../../../lib -g -copt -fPIC  -c fcgi-binding.scm -o fcgi-binding_s.o
fcgi-binding_s.c:14:24: error: fcgi_stdio.h: No such file or directory
make[2]: *** [fcgi-binding_s.o] Error 1
make[2]: Leaving directory `/home/daniel/roadsend-php-2.9.4/webconnect/fastcgi'
make[1]: *** [web-backends] Error 2
make[1]: Leaving directory `/home/daniel/roadsend-php-2.9.4/webconnect'
make: *** [web-backends] Error 2 

[weyrick]

see also #3495