sergiotarxz/libvips
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test for gcc4 and ban vectors

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it has severe code gen problems, it seems

this seems to ban clang as well, unfortunately
This commit is contained in:
John Cupitt 2017-10-07 11:20:21 +01:00
parent 31851d6e54
commit 3f22424d3b
2 changed files with 37 additions and 5 deletions
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10
ChangeLog
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@ -26,7 +26,7 @@
29/8/17 started 8.5.9
- make --fail stop jpeg read on any libjpeg warning, thanks @mceachen
- don't build enumtypes so often, removing perl as a compile dependancy
- don't build enumtypes so often -- helps remove perl as a compile dependency
2/8/17 started 8.5.8
- fix transparency detection in merge, thanks Haida
@ -540,7 +540,7 @@
- vips_system() now supports many input images and you can change image
argument order
- support 16-bit palette TIFFs, plus palette TIFFs can have an alpha
- libgsf-1 is now an optional dependancy
- libgsf-1 is now an optional dependency
- dzsave can directly write a ZIP file
- add ".vips" as an alternative suffix for vips files
- added vips_tiffload_buffer()
@ -1204,9 +1204,9 @@
- fix gtk-doc warnings
- small mask load/save improvements
- mask gtk-doc done
- add cfitsio dependancy
- add cfitsio dependency
- add FITS reader
- land the vector branch and the orc dependancy ... we have SSE
- land the vector branch and the orc dependency ... we have SSE
erode/dilate/add/conv
- add IM_SWAP
- dilate/erode do (!=0) on non-uchar images
@ -2059,7 +2059,7 @@
- "," allowed as column separator in mask read
- better at spotting singular matricies
- small im_render() tidies
- glib dependancy reduced to just 2.0, but untested ... helps people building
- glib dependency reduced to just 2.0, but untested ... helps people building
on older systems who aren't interested in nip2
- removing leading spaces from IMAGEVEC arguments
- load non-interlaced PNGs more efficiently

32
configure.ac
View File

@ -305,6 +305,29 @@ AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, "$GETTEXT_PACKAGE",
ALL_LINGUAS="en_GB de"
AM_GLIB_GNU_GETTEXT
# we need to disable some features on some known-bad gcc versions
# these will be "" for clang etc.
#
# I couldn't get this to work, mysterious! do it ourselves
#
# AX_CHECK_COMPILE_FLAG([-dumpversion],
# [ax_gcc_version_option=yes],
# [ax_gcc_version_option=no]
# )
AC_MSG_CHECKING([for gcc version])
GCC_VERSION=""
version=$($CC -dumpversion)
if test $? = 0; then
GCC_VERSION=$version
AC_MSG_RESULT([$GCC_VERSION])
else
AC_MSG_RESULT([-dumpversion not supported])
fi
GCC_VERSION_MAJOR=$(echo $GCC_VERSION | cut -d'.' -f1)
GCC_VERSION_MINOR=$(echo $GCC_VERSION | cut -d'.' -f2)
GCC_VERSION_PATCH=$(echo $GCC_VERSION | cut -d'.' -f3)
# Checks for libraries.
# build list of pkg-config packages we used here
@ -343,6 +366,15 @@ AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
# g++/gcc 4.x have rather broken vector support
AC_MSG_CHECKING([for gcc with working vector support])
if test x$GCC_VERSION_MAJOR != x"4"; then
AC_MSG_RESULT([yes])
else
ax_cv_have_var_attribute_vector_size=no
AC_MSG_RESULT([no])
fi
# we need to be able to shuffle vectors in C++
if test x$ax_cv_have_var_attribute_vector_size = x"yes"; then
AC_MSG_CHECKING([for C++ vector shuffle])