#!/bin/sh
# created: Ben Allan, Sandia Labs/CA Livermore 8/1/2000
# This script (at least in gnu platforms) generates a minimal header of
# functions for C consumption given a library and its dependencies.
# e.g.
# ./genlibheader /usr/local/lib/libblas.a /usr/lib/gcc-lib/i386-redhat-linux/egcs-2.90.29/libf2c.a -lm
# ./genlibheader /usr/local/lib/liblapack.a -lblas.a /usr/lib/gcc-lib/i386-redhat-linux/egcs-2.90.29/libf2c.a -lm
# 
# The output will not be correct, probably, but it will satisfy the linker and compiler.
# used in this script.
flist=`nm --defined -f p $1 | grep ' T ' | sed -e 's% T % %g' |sed -e 's% 0.......% %g'`
LDFLAGS="$*"
LIBS=""
ac_ext=c
ac_exeext=.exe
outfile=ftypes.h
errfile=ftypes.log
/bin/rm $outfile
/bin/rm $errfile
echo "generating $outfile"
echo "/* $0 analysis of $* */" > $outfile
echo "/* types are sufficient to satisfy the linker, but not 100% accurate. */" >> $outfile
echo "messages in $errfile"
echo "/* $0 log of analyzing $* */" > $errfile
for fn in $flist; do

	echo "testing $fn"
	intcode="extern int $fn(); main() { int i; i = $fn(); exit(0); }"
	intfunc=no
	voidcode="extern void $fn(); main() { $fn(); exit(0); }"
	voidfunc=no
	floatcode="extern float $fn(); main() { float f; f = $fn(); exit(0); }"
	floatfunc=no
	doublecode="extern double $fn(); main() { double d; d = $fn(); exit(0); }"
	doublefunc=no

	ac_compile='${CC-cc} -c conftest.$ac_ext 1>>$errfile'
	ac_link="cc -o conftest${ac_exeext} conftest.$ac_ext $LDFLAGS $LIBS 1>>$errfile"

	/bin/rm -f conftest.$ac_ext
	echo $voidcode > conftest.$ac_ext
        echo -n "trying void, "
	if { (eval $ac_link) 2>>$errfile; } && test -s conftest${ac_exeext}; then
  		voidfunc=yes
		echo "extern void $fn();" >> $outfile
        	echo "yes"
		continue
	else
		echo "SRC=$voidcode" >>$errfile
	fi

	/bin/rm -f conftest.$ac_ext
	echo $doublecode > conftest.$ac_ext
        echo -n "double, "
	if { (eval $ac_link) 2>>$errfile; } && test -s conftest${ac_exeext}; then
  		doublefunc=yes
		echo "extern double $fn();" >> $outfile
        	echo "yes"
		continue
	else
		echo "SRC=$doublecode" >>$errfile
	fi

	/bin/rm -f conftest.$ac_ext
	echo $floatcode > conftest.$ac_ext
        echo -n "float, "
	if { (eval $ac_link) 2>>$errfile; } && test -s conftest${ac_exeext}; then
  		floatfunc=yes
		echo "extern float $fn();" >> $outfile
        	echo "yes"
		continue
	else
		echo "SRC=$floatcode" >>$errfile
	fi

	/bin/rm -f conftest.$ac_ext
	echo $intcode > conftest.$ac_ext
        echo -n "int, "
	if { (eval $ac_link) 2>>$errfile; } && test -s conftest${ac_exeext}; then
  		intfunc=yes
		echo "extern int $fn();" >> $outfile
        	echo "yes"
		continue
	else
		echo "SRC=$intcode" >>$errfile
	fi

        echo "none."
	echo "FAILED -- $fn -- $ac_link"

done