Cross compile PHP with UCLIBC

THIS IS A REPOST, PREVIOUS POST GOT CLOSED, MOVED TO SERVERFAULT AND CLOSED AGAIN. I think this post is a valid stackoverflow problem because i think its caused by some automake/compile/linking error. This is a programming problem not a server admin problem. Cross compile PHP https://serverfault.com/questions/418521/cross-compile-php Start of post I have downloaded the PHP 5.4.0 source, extracted it and moved into the source folder. I do a configure with: ``` ./configure --build=x86_64-unknown-linux-gnu --host=arm-linux-uclibcgnueabi --prefix=/usr/arm/www CC="arm-linux-uclibcgnueabi-gcc --sysroot=/toolchains/gnu_cortex-a9_tools/" --disable-libxml --disable-dom --without-iconv --without-openssl --disable-simplexml --disable-xml --disable-xmlreader --disable-xmlwriter --without-pear --without-sqlite3 --disable-pdo --without-pdo-sqlite --disable-phar --with-config-file-path=/etc/ ``` Followed by ``` make ``` no errors, everything runs fine. Next i do a make install. ``` make install ``` Again everything runs fine. i move it to the target platform and run ``` /usr/arm/www/bin/php -v PHP 5.4.0 (cli) (built: Aug 15 2012 16:07:41) Copyright (c) 1997-2012 The PHP Group Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies ``` I test a simple home page with my webserver and directly with php. ``` <?php echo "hello" ?> # php index.php hello ``` it works as expected. next i test: ``` <?php $output = shell_exec('ls -lart'); echo "<pre>$output</pre>"; ?> ``` oh noes~ ``` # php shell.php Segmentation fault ``` I teset another script: ``` #!/bin/php <?php echo "hello"; $handle = fopen("info.txt", "r"); echo $handle; ?> ``` Same result: ``` # php index.php helloSegmentation fault ``` do i have a php.ini? ``` # /usr/arm/www/bin/php --ini Configuration File (php.ini) Path: /etc/ Loaded Configuration File: /etc/php.ini ``` yes, and no disabled functions. testing strace /usr/arm/www/bin/php index.php ``` lstat("/srv/www/info.txt", {st_mode=S_IFREG|0644, st_size=20, ...}) = 0 open("/srv/www/info.txt", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=20, ...}) = 0 lseek(3, 10, SEEK_CUR) = 0 --- SIGSEGV (Segmentation fault) @ 0 (0) --- +++ killed by SIGSEGV +++ ``` the file info.txt exists and it got premission to read/write to it. Testing strace /usr/arm/www/bin/php shell.php ``` fcntl64(3, F_GETFL) = 0 (flags O_RDONLY) ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7e31fddc) = -1 EINVAL (Invalid argument) vfork() = 3324 close(4) = 0 fstat(3, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0 read(3, "total 24\n-rw-rw-r-- 1 1001 "..., 8192) = 468 read(3, ""..., 8192) = 0 --- SIGCHLD (Child exited) @ 0 (0) --- close(3) = 0 wait4(3324, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 3324 --- SIGSEGV (Segmentation fault) @ 0 (0) --- +++ killed by SIGSEGV +++ ``` if i run the index.php through gdb it gives me: ``` Starting program: /usr/arm/www/bin/php index.php hello Program received signal SIGSEGV, Segmentation fault. zend_do_fcall_common_helper_SPEC (execute_data=0x2ac7a040) at /home/maiden/Downloads/php-5.4.0/Zend/zend.h:391 391 /home/maiden/Downloads/php-5.4.0/Zend/zend.h: No such file or directory. in /home/maiden/Downloads/php-5.4.0/Zend/zend.h ``` gdb gives me this from shell.php Starting program: /usr/arm/www/bin/php shell.php ``` Program received signal SIGSEGV, Segmentation fault. zend_do_fcall_common_helper_SPEC (execute_data=0x2ab76040) at /home/maiden/Downloads/php-5.4.0/Zend/zend.h:391 391 in /home/maiden/Downloads/php-5.4.0/Zend/zend.h ``` zend.h is located in /usr/arm/www/include/php/Zend/ obviously something went wrong during cross compilation. what have i missed? i do not find any configure flag to correct this and creating a symlink to the desired location removes the gdb output but php still segfaults. Thanks for any help! UPDATE: ``` # valgrind php test.php ==2181== Memcheck, a memory error detector ==2181== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al. ==2181== Using Valgrind-3.8.0 and LibVEX; rerun with -h for copyright info ==2181== Command: php test.php ==2181== ==2181== Conditional jump or move depends on uninitialised value(s) ==2181== at 0x4004EC8: ??? (in /lib/ld-uClibc-0.9.30-nptl.so) ==2181== ==2181== Invalid read of size 4 ==2181== at 0x4004D48: _dl_get_ready_to_run (in /lib/ld-uClibc-0.9.30-nptl.so) ==2181== Address 0x7d4cc304 is just below the stack ptr. To suppress, use: --workaround-gcc296-bugs=yes ==2181== ==2181== Invalid read of size 4 ==2181== at 0x48C348C: __uClibc_main (in /lib/libuClibc-0.9.30-nptl.so) ==2181== Address 0x7d4cc554 is just below the stack ptr. To suppress, use: --workaround-gcc296-bugs=yes ==2181== ==2181== Invalid write of size 4 ==2181== at 0x233010: __eqdf2 (ieee754-df.S:1120) ==2181== Address 0x7d4cb0bc is just below the stack ptr. To suppress, use: --workaround-gcc296-bugs=yes ==2181== Warning: shell_exec(): Unable to execute 'ls -lart' in /test.php on line 3 ==2181== Invalid read of size 4 ==2181== at 0x1FF1AC: zend_do_fcall_common_helper_SPEC (zend.h:391) ==2181== by 0x1F3D17: execute (zend_vm_execute.h:410) ==2181== by 0x18B217: zend_execute_scripts (zend.c:1279) ==2181== by 0x1365BB: php_execute_script (main.c:2473) ==2181== by 0x22B52B: do_cli (php_cli.c:988) ==2181== by 0x22BD4B: main (php_cli.c:1364) ==2181== Address 0x8 is not stack'd, malloc'd or (recently) free'd ==2181== Segmentation fault ``` Update2 re-run valgrind with memcheck, got about the same output as before but this was new: ``` php: can't resolve symbol '__libc_freeres' ``` Update3 While valgrind have failed me, i continued with gdb, i created the folder /home/maiden/..etc on my target system and copied over the content of my php/include folder and re-run gdb. now i get this error message: ``` (gdb) run index.php Starting program: /bin/php index.php hello Program received signal SIGSEGV, Segmentation fault. zend_do_fcall_common_helper_SPEC (execute_data=0x2ab34040) at /home/maiden/Downloads/php-5.4.5/Zend/zend.h:391 warning: Source file is more recent than executable. 391 return --pz->refcount__gc; ``` this is very similar to what sixeightzero wrote in the comments yesterday. I have now tried PHP version 5.3.5, 5.4.0, 5.4.5 same error on all. Update4 I downloaded a new toolchain for glibc, cross compiled a new busybox with glibc, created a chroot jail, cross compiled php with glibc instead of uclibc and tested it inside my chroot jail on my uclibc box, and it works! But i still need to get php to work in my uclibc environment....