Created attachment 1242110 [details] info.txt Description of problem: Undefined symbol trying to run PHP build against GCC 6.2 Version-Release number of selected component (if applicable): 6.2.1-3.1.el7 How reproducible: Steps to Reproduce: 1. build PHP 7.1 with devtoolset-6-toolchain installed 2. run php -v 3. Actual results: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/intl.so' - /usr/lib64/php/modules/intl.so: undefined symbol: __cxa_throw_bad_array_new_length in Unknown on line 0 Expected results: No error Additional info: See attachement (with diff of missing symbols between 4.8 and 6.2 build), so __cxa_throw_bad_array_new_length seems to be the only missing one.
That symbol is provided in libstdc++_nonshared.a, so the above looks like a bug in how the intl.so plugin is linked. Are you sure you are linking it with g++ ... -shared ... rather than say ld -shared?
Created attachment 1242113 [details] build.log.gz Full build.log
From above output, link uses libtool command: /bin/sh /builddir/build/BUILD/php-7.1.1/build-cgi/libtool --silent --preserve-dup-deps --mode=link cc ...
-mode=link cc ... that is of course a bug, if the module is written in C++, it should have been c++ or g++ instead of cc.
Great thanks for given information which helps a lot on this issue, which indeed should be fixed in PHP. Simple patch: --- a/ext/intl/config.m4 +++ b/ext/intl/config.m4 @@ -86,7 +86,7 @@ if test "$PHP_INTL" != "no"; then breakiterator/codepointiterator_methods.cpp \ uchar/uchar.c \ idn/idn.c \ - $icu_spoof_src, $ext_shared,,$ICU_INCS -Wno-write-strings -D__STDC_LIMIT_MACROS -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1) + $icu_spoof_src, $ext_shared,,$ICU_INCS -Wno-write-strings -D__STDC_LIMIT_MACROS -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1,cxx) PHP_ADD_BUILD_DIR($ext_builddir/collator) PHP_ADD_BUILD_DIR($ext_builddir/converter) PHP_ADD_BUILD_DIR($ext_builddir/common) Going to report/fix it upstream