synthesize-float   [plain text]

#!/bin/sh
#
# Synthesize float.h to be installed in the the system.
#
# This used to do all sorts of things, but now it just makes one change
# to support FLT_ROUNDS.
#
# This script is only called from the top-level GNUmakefile.  It
# is called as follows:
#
# synthesize_float $(SRCROOT) file $(RC_RELEASE)
#
# i.e., it will process $(SRCROOT)/gcc/config/float.h and
# and output the header into the file.
#
cat <<EOF >"$2"
/* float.h */
#ifndef _FLOAT_H_
#define _FLOAT_H_

EOF

cat "$1"/gcc/ginclude/float.h | grep -v _FLOAT_H___ >>"$2"

cat <<EOF >/tmp/fegetfltrounds$$.c
extern int __fegetfltrounds (void);
int main()
{
  return __fegetfltrounds ();
}
EOF

set -x
if [ "$3" != "Proton" ]; then
    if cc /tmp/fegetfltrounds$$.c -o /tmp/xfegetfltrounds.$$ &> /dev/null; then
cat <<EOF >>"$2"

#ifdef __cplusplus
extern "C" {
#endif
extern int __fegetfltrounds( void ); 
#ifdef __cplusplus
}
#endif
#undef FLT_ROUNDS
#define FLT_ROUNDS (__fegetfltrounds ())
EOF
    fi
    rm -f /tmp/fegetfltrounds$$.c /tmp/xfegetfltrounds.$$
fi

cat <<EOF >>"$2"

#endif /* _FLOAT_H_ */
EOF