Bug #74039 [Com]: is_infinite(-INF) returns false

Edit report at https://bugs.php.net/bug.php?id=74039&edit=1 ID: 74039 Comment by: georgi at unixsol dot org Reported by: bugs dot php dot net at chsc dot dk Summary: is_infinite(-INF) returns false Status: Closed Type: Bug Package: Math related Operating System: Alpine Linux PHP Version: 7.0.15 Assigned To: nikic Block user comment: N Private report: N New Comment: The C example code does not compile on CentOS 5: georgi@cent5:~$ cat > z.c #include <math.h> #ifndef isfinite # error Not defined #endif void main() {} georgi@cent5:~$ gcc z.c z.c:3:3: error: #error Not defined z.c: In function ‘main’: z.c:5: warning: return type of ‘main’ is not ‘int’ georgi@cent5:~$ rpm -qa | grep glibc | sort | uniq glibc-2.5-58.el5_6.3 glibc-common-2.5-58.el5_6.3 glibc-devel-2.5-58.el5_6.3 glibc-headers-2.5-58.el5_6.3 Previous Comments: ------------------------------------------------------------------------ [2017-03-17 19:12:35] nikic@php.net CentOS issue also reported in bug #74265. ------------------------------------------------------------------------ [2017-03-17 16:50:40] nikic@php.net Does #include <math.h> #ifndef isfinite # error Not defined #endif void main() {} compile for you? This seems pretty weird, because glibc should have isfinite(). ------------------------------------------------------------------------ [2017-03-17 16:32:12] georgi at unixsol dot org The fix in https://github.com/php/php-src/commit/714d825b62e719447686da6efe3b4063c2f25749 breaks the build for me for PHP 7.1.3 and PHP 7.0.17 branches: The build fails with: ext/filter/.libs/logical_filters.o: In function `php_filter_float': /home/georgi/build/BUILD/php71-7.1.3/src/ext/filter/logical_filters.c:411: undefined reference to `isfinite' ext/intl/collator/.libs/collator_is_numeric.o: In function `collator_is_numeric': /home/georgi/build/BUILD/php71-7.1.3/src/ext/intl/collator/collator_is_numeric.c:255: undefined reference to `isfinite' ext/standard/.libs/math.o: In function `zif_is_finite': /home/georgi/build/BUILD/php71-7.1.3/src/ext/standard/math.c:589: undefined reference to `isfinite' ext/standard/.libs/math.o: In function `_php_math_round': /home/georgi/build/BUILD/php71-7.1.3/src/ext/standard/math.c:133: undefined reference to `isfinite' /home/georgi/build/BUILD/php71-7.1.3/src/ext/standard/math.c:201: undefined reference to `isfinite' ext/standard/.libs/var.o:/home/georgi/build/BUILD/php71-7.1.3/src/ext/standard/var.c:473: more undefined references to `isfinite' follow After reverting 714d825b62e719447686da6efe3b4063c2f25749, I can build both 7.0 and 7.1 as before. I can provide any logs necessary to track the problem. The build machine is CentOS 5.5 with glibc-devel-2.5-58.el5_6.3. ------------------------------------------------------------------------ [2017-02-05 17:15:44] nikic@php.net Fixed by https://github.com/php/php-src/commit/9ea0949f43959ff0cf519e7a10ef9de7a538cde3. ------------------------------------------------------------------------ [2017-02-05 01:51:03] ajf@php.net See also: bug #73954 ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=74039 -- Edit this bug report at https://bugs.php.net/bug.php?id=74039&edit=1