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      1 dnl Add a set of flags to WARNING_FLAGS, that enable compiler warnings for
      2 dnl isl. The warnings that are enabled vary with the compiler and only include
      3 dnl warnings that did not trigger at the time of adding these flags.
      4 AC_DEFUN([AX_SET_WARNING_FLAGS],[dnl
      5 	AX_COMPILER_VENDOR
      6 
      7 	WARNING_FLAGS=""
      8 
      9 	if test "${ax_cv_c_compiler_vendor}" = "clang"; then
     10 		dnl isl is at the moment clean of -Wall warnings.  If clang adds
     11 		dnl new warnings to -Wall which cause false positives, the
     12 		dnl specific warning types will be disabled explicitally (by
     13 		dnl adding for example -Wno-return-type). To temporarily disable
     14 		dnl all warnings run configure with CFLAGS=-Wno-all.
     15 		WARNING_FLAGS="-Wall"
     16 	fi
     17 ])
     18