[glibc/release/2.36/master] linux: Use compile_c_snippet to check linux/pidfd.h availability

[glibc/release/2.36/master] linux: Use compile_c_snippet to check linux/pidfd.h availability

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1cc5513114e76083669cba1b11252aad35525e69

commit 1cc5513114e76083669cba1b11252aad35525e69
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed Aug 10 14:24:44 2022 -0300

    linux: Use compile_c_snippet to check linux/pidfd.h availability
    
    Instead of tying to a specific kernel version.
    
    Checked on x86_64-linux-gnu.
    
    Reviewed-by: Florian Weimer <fweimer@redhat.com>
    (cherry picked from commit 1542019b69b7ec7b2cd34357af035e406d153631)

Diff:
---
 sysdeps/unix/sysv/linux/tst-pidfd-consts.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/tst-pidfd-consts.py b/sysdeps/unix/sysv/linux/tst-pidfd-consts.py
index 90cbb9be64..d732173abd 100644
--- a/sysdeps/unix/sysv/linux/tst-pidfd-consts.py
+++ b/sysdeps/unix/sysv/linux/tst-pidfd-consts.py
@@ -33,11 +33,13 @@ def main():
                         help='C compiler (including options) to use')
     args = parser.parse_args()
 
-    linux_version_headers = glibcsyscalls.linux_kernel_version(args.cc)
-    # Linux started to provide pidfd.h with 5.10.
-    if linux_version_headers < (5, 10):
+    if glibcextract.compile_c_snippet(
+            '#include <linux/pidfd.h>',
+            args.cc).returncode != 0:
         sys.exit (77)
-    linux_version_glibc = (5, 18)
+
+    linux_version_headers = glibcsyscalls.linux_kernel_version(args.cc)
+    linux_version_glibc = (5, 19)
     sys.exit(glibcextract.compare_macro_consts(
                 '#include <sys/pidfd.h>\n',
                 '#include <asm/fcntl.h>\n'