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ICU-22310 Delete long since obsolete configure.ac sections.

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Having commented-out checks for things that don't even need to be
checked serves no purpose.

MSVC floating point optimizations don't need to be set, /fp:precise is
the default and has been so for a very long time now:

https://learn.microsoft.com/en-us/cpp/build/reference/fp-specify-floating-point-behavior?view=msvc-140

ICU4C requires C++17 and there aren't any compilers capable of that
without namespace support so there's no need to check that.
This commit is contained in:
Fredrik Roubert 2024-09-12 15:44:57 +02:00 • committed by Fredrik Roubert
parent 4433a94a57
commit 30fdd06cba
1 changed files with 0 additions and 34 deletions
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34
icu4c/source/configure.ac
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@ -186,9 +186,6 @@ if test "$srcdir" = "."; then
fi
fi
#AC_CHECK_PROG(AUTOCONF, autoconf, autoconf, true)
#AC_CHECK_PROG(STRIP, strip, strip, true)
# TODO(ICU-20301): Remove fallback to Python 2.
AC_CHECK_PROGS(PYTHON, python3 "py -3" python "py")
AC_SUBST(PYTHON)
@ -339,24 +336,6 @@ AC_ARG_ENABLE(auto-cleanup,
AC_MSG_RESULT($enabled)
AC_SUBST(UCLN_NO_AUTO_CLEANUP)
# MSVC floating-point option
MSVC_RELEASE_FLAG=""
if test $enabled = yes
then
if test $icu_cv_host_frag = mh-cygwin-msvc -o $icu_cv_host_frag = mh-msys-msvc
then
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if defined _MSC_VER && _MSC_VER >= 1400
#else
Microsoft Visual C++ < 2005
#endif
]], [[]])],[MSVC_RELEASE_FLAG="/fp:precise"],[MSVC_RELEASE_FLAG="/Op"])
CFLAGS="${CFLAGS} ${MSVC_RELEASE_FLAG}"
CXXFLAGS="${CXXFLAGS} ${MSVC_RELEASE_FLAG}"
fi
fi
# Check whether to enabled draft APIs
AC_MSG_CHECKING([whether to enable draft APIs])
enabled=yes
@ -710,20 +689,7 @@ fi
AC_SUBST(U_HAVE_NL_LANGINFO_CODESET)
AC_SUBST(U_NL_LANGINFO_CODESET)
# Namespace support checks
AC_LANG(C++)
AC_MSG_CHECKING([for namespace support])
AC_CACHE_VAL(ac_cv_namespace_ok,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([namespace x_version {void f(){}}
namespace x = x_version;
using namespace x_version;
], [f();])],[ac_cv_namespace_ok=yes],[ac_cv_namespace_ok=no])] )
AC_MSG_RESULT($ac_cv_namespace_ok)
if test $ac_cv_namespace_ok = no
then
AC_MSG_ERROR(Namespace support is required to build ICU.)
fi
AC_MSG_CHECKING([for properly overriding new and delete])
U_OVERRIDE_CXX_ALLOCATION=0
U_HAVE_PLACEMENT_NEW=0