[glibc] support: introduce support_sysconfdir_prefix

[glibc] support: introduce support_sysconfdir_prefix

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=57ce87a940071a152a27e1e1be1dc9eced55ca6c

commit 57ce87a940071a152a27e1e1be1dc9eced55ca6c
Author: Romain Geissler <romain.geissler@gmail.com>
Date:   Sun Mar 26 20:00:14 2023 +0000

    support: introduce support_sysconfdir_prefix
    
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Diff:
---
 support/Makefile        | 3 ++-
 support/support.h       | 2 ++
 support/support_paths.c | 7 +++++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/support/Makefile b/support/Makefile
index 05b31159ea..71d5148513 100644
--- a/support/Makefile
+++ b/support/Makefile
@@ -231,7 +231,8 @@ CFLAGS-support_paths.c = \
 		-DSBINDIR_PATH=\"$(sbindir)\" \
 		-DSLIBDIR_PATH=\"$(slibdir)\" \
 		-DROOTSBINDIR_PATH=\"$(rootsbindir)\" \
-		-DCOMPLOCALEDIR_PATH=\"$(complocaledir)\"
+		-DCOMPLOCALEDIR_PATH=\"$(complocaledir)\" \
+		-DSYSCONFDIR_PATH=\"$(sysconfdir)\"
 
 # In support_timespec_check_in_range we may be passed a very tight
 # range for which we should produce a correct result for expected
diff --git a/support/support.h b/support/support.h
index 525ff1ebce..b7f76bf080 100644
--- a/support/support.h
+++ b/support/support.h
@@ -144,6 +144,8 @@ extern const char support_slibdir_prefix[];
 extern const char support_install_rootsbindir[];
 /* Corresponds to the install's compiled locale directory.  */
 extern const char support_complocaledir_prefix[];
+/* Corresponds to the install's etc/ directory.  */
+extern const char support_sysconfdir_prefix[];
 
 /* Copies the file at the path FROM to TO.  If TO does not exist, it
    is created.  If TO is a regular file, it is truncated before
diff --git a/support/support_paths.c b/support/support_paths.c
index f9d75998cf..0710bcd412 100644
--- a/support/support_paths.c
+++ b/support/support_paths.c
@@ -92,3 +92,10 @@ const char support_complocaledir_prefix[] = COMPLOCALEDIR_PATH;
 #else
 # error please -DCOMPLOCALEDIR_PATH=something in the Makefile
 #endif
+
+#ifdef SYSCONFDIR_PATH
+/* Corresponds to the install's etc/ directory.  */
+const char support_sysconfdir_prefix[] = SYSCONFDIR_PATH;
+#else
+# error please -DSYSCONFDIR_PATH=something in the Makefile
+#endif