alsa-project/alsa-lib issue #485 was opened from darkshram:

### Description

I encountered a build failure while compiling **alsa-lib 1.2.15** due to an undefined reference to `close_range`. My environment uses **glibc 2.30**, which should support this function.

### Error Message

``` ucm/.libs/libucm.a(ucm_exec.o): In function `uc_mgr_exec': /builddir/build/BUILD/alsa-lib-1.2.15/src/ucm/ucm_exec.c:263: undefined reference to `close_range' collect2: error: ld returned 1 exit status ```

### Solution

To resolve the issue, I applied the following patch, which effectively reverses [the change that introduced](https://github.com/alsa-project/alsa-lib/pull/459) `close_range`:

``` diff -Naur alsa-lib-1.2.15.orig/src/ucm/ucm_exec.c alsa-lib-1.2.15/src/ucm/ucm_exec.c --- alsa-lib-1.2.15.orig/src/ucm/ucm_exec.c 2025-12-07 13:41:56.000000000 -0600 +++ alsa-lib-1.2.15/src/ucm/ucm_exec.c 2025-12-08 15:03:30.632324127 -0600 @@ -259,12 +259,8 @@ close(f);

-#if defined(_GNU_SOURCE) - close_range(3, maxfd, 0); -#else for (f = 3; f < maxfd; f++) close(f); -#endif

/* install default handlers for the forked process */ signal(SIGINT, SIG_DFL); ``` This workaround restored compatibility and allowed the build to complete successfully.

### Additional Information

Please consider this issue for further review. If close_range is required, clearer compatibility notes might be beneficial. Thank you!

Issue URL : https://github.com/alsa-project/alsa-lib/issues/485 Repository URL: https://github.com/alsa-project/alsa-lib