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  1. $ ls TestPrograms/
  2. dump2def.cxx         test_arm_sm4.cxx      test_x86_avx.cxx
  3. test_32bit.cxx       test_cxx.cxx          test_x86_avx2.cxx
  4. test_64bit.cxx       test_mixed_asm.cxx    test_x86_avx512.cxx
  5. ...
  6.    
  7. $ cat test_cxx.cxx
  8. #include <string>
  9. int main(int argc, char* argv[])
  10. {
  11.     unsigned int x=0;
  12.     return x;
  13. }
  14.    
  15. CXXFLAGS="-msse2"
  16. AC_MSG_CHECKING([if $CXXNAME supports $CXXFLAGS and Foo Bar])
  17. AC_LINK_IFELSE(
  18.    [AC_LANG_PROGRAM([TestPrograms/test_x86_sse2.cxx])],
  19.    [AC_MSG_RESULT([yes])],
  20.    [AC_MSG_RESULT([no])]
  21. )
  22.    
  23. checking if g++ supports -msse2 and Foo Bar... no
  24.    
  25. CXXFLAGS="-msse2"
  26. AC_MSG_CHECKING([if $CXXNAME supports $CXXFLAGS and Foo Bar])
  27. AC_LINK_IFELSE(
  28.    [AC_LANG_PROGRAM(`cat TestPrograms/test_x86_sse2.cxx`)],
  29.    [AC_MSG_RESULT([yes])],
  30.    [AC_MSG_RESULT([no])]
  31. )
  32.    
  33. $ g++ -msse2 TestPrograms/test_x86_sse2.cxx
  34. $
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