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Detect and avoid broken unordered_map on OSX 10.5 / GCC 4.0.1.

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kenton@google.com 2010-01-07 04:40:54 +00:00
parent 2773bdf239
commit 83aba29ebe
1 changed files with 7 additions and 1 deletions
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8
m4/stl_hash.m4
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@ -22,8 +22,14 @@ AC_DEFUN([AC_CXX_STL_HASH],
if test -z "$ac_cv_cxx_hash_map_header"; then
# On OSX 1.5 / GCC 4.0.1 (the standard compiler on that platform),
# calling find() on a const unordered_map does not compile. So, we
# include a call to find() in our test to detect this broken
# implementation and avoid using it. Note that ext/hash_map works
# fine on this platform, so we'll end up using that.
AC_TRY_COMPILE([#include <$location>],
[${namespace}::$name<int, int> t],
[const ${namespace}::$name<int, int> t;
t.find(1);],
[ac_cv_cxx_hash_map_header="<$location>";
ac_cv_cxx_hash_namespace="$namespace";
ac_cv_cxx_hash_map_class="$name";])