Automatic generation of -L/usr/lib/lib and -R/lots/of/directories

I use the folwowing script to configure php - and am wondering where the 
strange arguments are coming from while configure runs.

export LDFLAGS='-blibpath:/usr/local/lib:/usr/lib:/usr/local/mysql/lib'
export CC=xlc
./configure \
         --with-apxs2=/usr/local/apache2/bin/apxs \
         --enable-safe-mode \
         --enable-magic-quotes \
         --disable-bcmath \
         --enable-dba \
         --enable-ftp \
         --with-gd \
         --with-jpeg-dir=/usr/local/lib  \
         --with-ttf \
         --with-curlwrappers \
         --with-curl \
         --with-freetype-dir \
         --with-libxml-dir \
         --enable-gd-native-ttf \
         --with-mysql=/usr/local/mysql \
         --with-pear=/usr/local/bin


I see that tests if -R is accepted, so maybe it assumes they are needed. 
ld just says they are ignored.

configure:26813: xlc -o conftest -g  -R/usr/local/lib -L/usr/local/lib 
-R/usr/lib/lib -L/usr/lib/lib -R/usr/local/lib -L/usr/local/lib 
-blibpath:/usr/local/lib:/usr/lib:/usr/l
ocal/mysql/lib -R/usr/local/lib -L/usr/local/lib -R/usr/lib/lib 
-L/usr/lib/lib -lcurl -lssl -lcrypto conftest.c -lcurl  -lcurl -lrt -lm 
  -lxml2 -liconv -lm -lcurl -lssl -lcryp
to 1>&5
ld: 0706-027 The -R /usr/local/lib flag is ignored.
ld: 0706-027 The -R /usr/lib/lib flag is ignored.
ld: 0706-027 The -R /usr/local/lib flag is ignored.
ld: 0706-027 The -R /usr/local/lib flag is ignored.


The -L/usr/lib/lib might be a problem - because if the program would 
just look in /usr/lib most things would be found.

Note: I am slowly recompiling all the things in /usr/lib that are being 
missed. /usr/lib is a default location so I shall never modify anything 
there.

FYI: platform is AIX 5.3, compiler is xlC 7