Cannot build pcov in-tree

[nikic]

The version check in

pcov/config.m4

Line 8 in 6a38be3

PHP_VERSION=$($PHP_CONFIG --vernum)

does not work for an in-tree build, only when going through phpize.

[krakjoe]

@remicollet do you know the right incantation for autotools ?

[manarth]

Also in-tree appears to surface a duplicate-definition error:

#32 2.289 /usr/lib/gcc/x86_64-alpine-linux-musl/11.2.1/../../../../x86_64-alpine-linux-musl/bin/ld: Zend/Optimizer/zend_cfg.o: in function `zend_cfg_remark_reachable_blocks':
#32 2.293 /opt/php-src/Zend/Optimizer/zend_cfg.c:235: multiple definition of `zend_cfg_remark_reachable_blocks'; ext/pcov/cfg/704/zend_cfg.o:/opt/php-src/ext/pcov/cfg/704/zend_cfg.c:260: first defined here
#32 2.299 /usr/lib/gcc/x86_64-alpine-linux-musl/11.2.1/../../../../x86_64-alpine-linux-musl/bin/ld: Zend/Optimizer/zend_cfg.o: in function `zend_build_cfg':
#32 2.299 /opt/php-src/Zend/Optimizer/zend_cfg.c:271: multiple definition of `zend_build_cfg'; ext/pcov/cfg/704/zend_cfg.o:/opt/php-src/ext/pcov/cfg/704/zend_cfg.c:296: first defined here
#32 6.807 collect2: error: ld returned 1 exit status