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copied!<p>After posting I came across <a href="http://php-baustelle.de/CodeGen_PECL/manual.html" rel="noreferrer">CodeGen_PECL</a> which creates a skeleton extension from an XML based description of the extension. This includes a tag make it output C++</p> <p>As well as making sure the header file used extern "C", the generated cpp file also ensured the ZEND_GET_MODULE(hello) was inside an extern "C" block also.</p> <p>As expected, the biggest difference was in the m4 file, which looked like this:</p> <pre><code>dnl dnl $ Id: $ dnl PHP_ARG_ENABLE(hello, whether to enable hello functions, [ --enable-hello Enable hello support]) if test "$PHP_HELLO" != "no"; then PHP_REQUIRE_CXX AC_LANG_CPLUSPLUS PHP_ADD_LIBRARY(stdc++,,HELLO_SHARED_LIBADD) export OLD_CPPFLAGS="$CPPFLAGS" export CPPFLAGS="$CPPFLAGS $INCLUDES -DHAVE_HELLO" AC_MSG_CHECKING(PHP version) AC_TRY_COMPILE([#include <php_version.h>], [ #if PHP_VERSION_ID < 40000 #error this extension requires at least PHP version 4.0.0 #endif ], [AC_MSG_RESULT(ok)], [AC_MSG_ERROR([need at least PHP 4.0.0])]) export CPPFLAGS="$OLD_CPPFLAGS" PHP_SUBST(HELLO_SHARED_LIBADD) AC_DEFINE(HAVE_HELLO, 1, [ ]) PHP_NEW_EXTENSION(hello, hello.cpp , $ext_shared) fi </code></pre> <p>So, if you're struggling with the same problem, use <a href="http://php-baustelle.de/CodeGen_PECL/manual.html" rel="noreferrer">CodeGen_PECL</a>, or adapt the m4 sample above (as well as making sure you've used extern "C" in your header and around the ZEND_GET_MODULE macro)</p>

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