main/io build directory missing from PHP_ADD_BUILD_DIR, breaks out-of-tree (VPATH) builds - #22913
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PHP_ADD_SOURCES([main/io], ...) adds the new I/O subsystem sources (php_io.c, php_io_copy_*.c) to the build, but main/io was never added to the PHP_ADD_BUILD_DIR list. Since only directories in that list get pre-created for out-of-tree (VPATH) builds, main/io/ never existed in such build trees, causing: fatal error: opening dependency file main/io/php_io_copy_freebsd.dep: No such file or directory for every file in main/io/ when building outside the source tree (e.g. Debian's separate fpm-build/cli-build directories). Add main/io to PHP_ADD_BUILD_DIR, alongside the other source directories (main, main/poll, main/streams, TSRM, Zend, ...).
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Cc @bukka Also, the io headers should be rechecked in this context. In Windows, they are specified as public but in Autotools not. Yet in GitHub yaml file they are marked as ABI break. 🤷♂️ |
bukka
approved these changes
Aug 2, 2026
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only main/php_io.h should be exported. The rest is internal. |
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I file a PR to remove them on Windows: #23003 |
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Building PHP 8.6.0alpha3 in an out-of-tree build directory (VPATH build, e.g. Debian's separate fpm-build/cli-build dirs) fails while compiling the new main/io/*.c files:
The same error occurs for php_io.c, php_io_copy_linux.c, php_io_copy_solaris.c, and php_io_copy_macos.c.
configure.ac registers the sources via PHP_ADD_SOURCES([main/io], ...), but the main/io directory was never added to the PHP_ADD_BUILD_DIR([...]) list that configure uses to pre-create build directories for VPATH builds. Every other directory containing sources (main, main/poll, main/streams, TSRM, Zend, etc.) is listed there; main/io was simply omitted when the new I/O subsystem was introduced. As a result, main/io/ never gets created in the build tree, and the compiler can't write the .dep/.o files into it.