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Fixed an issue with caching of sizeof(int) in configure.ac

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Neil Brown 2008-03-17 17:35:28 +00:00
parent 6059c99b19
commit c110eada17
1 changed files with 8 additions and 2 deletions
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10
configure.ac
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@ -142,12 +142,18 @@ AM_CONDITIONAL([GHC68],[test $ghc_version_major -ge 6 -a $ghc_version_mid -ge 8]
# Check the sizes of certain constructs. We'll need to be cleverer if in future
# we want to allow cross-compilation.
#There is a subtle trick below. If you ask autoconf for the size of int
#in both C and C++, it caches the result from one to the other.
#To allow for the possibility of the C and C++ compilers having a
#different size int (seems unlikely, but perhaps possible with cross
#compilation) we use unsigned int in C++ and int in C.
AC_LANG(C++)
AC_CHECK_SIZEOF(bool)
AC_COMPUTE_INT(CXX_BOOL_SIZE,SIZEOF_BOOL)
AC_SUBST(CXX_BOOL_SIZE)
AC_CHECK_SIZEOF(int)
AC_COMPUTE_INT(CXX_INT_SIZE,SIZEOF_INT)
AC_CHECK_SIZEOF(unsigned int)
AC_COMPUTE_INT(CXX_INT_SIZE,SIZEOF_UNSIGNED_INT)
AC_SUBST(CXX_INT_SIZE)
AC_LANG(C)
AC_CHECK_SIZEOF(_Bool)