https://github.com/python/cpython/commit/d26ce50f7bd59aa0bf6d1659ff96fb3a9075ff38
commit: d26ce50f7bd59aa0bf6d1659ff96fb3a9075ff38
branch: 3.13
author: Miss Islington (bot) <[email protected]>
committer: vstinner <[email protected]>
date: 2024-06-25T08:17:53Z
summary:

[3.13] gh-120671: Fix PY_CHECK_CC_WARNING() in configure.ac (GH-120822) 
(#120985)

gh-120671: Fix PY_CHECK_CC_WARNING() in configure.ac (GH-120822)

Add missing space in AS_VAR_APPEND() on CFLAGS.
(cherry picked from commit 2106c9bef0c18ff35db7d6c083cb8f189507758e)

Co-authored-by: Michael Allwright <[email protected]>

files:
A Misc/NEWS.d/next/Build/2024-06-21-09-24-03.gh-issue-120671.Z8sBQB.rst
M configure
M configure.ac

diff --git 
a/Misc/NEWS.d/next/Build/2024-06-21-09-24-03.gh-issue-120671.Z8sBQB.rst 
b/Misc/NEWS.d/next/Build/2024-06-21-09-24-03.gh-issue-120671.Z8sBQB.rst
new file mode 100644
index 00000000000000..bbe4a3038bc0ff
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2024-06-21-09-24-03.gh-issue-120671.Z8sBQB.rst
@@ -0,0 +1 @@
+Fix failing configure tests due to a missing space when appending to CFLAGS.
diff --git a/configure b/configure
index b7e2e8e159253a..e90f4759d3ffc4 100755
--- a/configure
+++ b/configure
@@ -9614,7 +9614,7 @@ then :
 else $as_nop
 
     py_cflags=$CFLAGS
-    as_fn_append CFLAGS "-Wextra -Werror"
+    as_fn_append CFLAGS " -Wextra -Werror"
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -9732,7 +9732,7 @@ then :
 else $as_nop
 
     py_cflags=$CFLAGS
-    as_fn_append CFLAGS "-Wunused-result -Werror"
+    as_fn_append CFLAGS " -Wunused-result -Werror"
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -9777,7 +9777,7 @@ then :
 else $as_nop
 
     py_cflags=$CFLAGS
-    as_fn_append CFLAGS "-Wunused-parameter -Werror"
+    as_fn_append CFLAGS " -Wunused-parameter -Werror"
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -9818,7 +9818,7 @@ then :
 else $as_nop
 
     py_cflags=$CFLAGS
-    as_fn_append CFLAGS "-Wint-conversion -Werror"
+    as_fn_append CFLAGS " -Wint-conversion -Werror"
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -9859,7 +9859,7 @@ then :
 else $as_nop
 
     py_cflags=$CFLAGS
-    as_fn_append CFLAGS "-Wmissing-field-initializers -Werror"
+    as_fn_append CFLAGS " -Wmissing-field-initializers -Werror"
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -9900,7 +9900,7 @@ then :
 else $as_nop
 
     py_cflags=$CFLAGS
-    as_fn_append CFLAGS "-Wsign-compare -Werror"
+    as_fn_append CFLAGS " -Wsign-compare -Werror"
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -9941,7 +9941,7 @@ then :
 else $as_nop
 
     py_cflags=$CFLAGS
-    as_fn_append CFLAGS "-Wunreachable-code -Werror"
+    as_fn_append CFLAGS " -Wunreachable-code -Werror"
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -9993,7 +9993,7 @@ then :
 else $as_nop
 
     py_cflags=$CFLAGS
-    as_fn_append CFLAGS "-Wstrict-prototypes -Werror"
+    as_fn_append CFLAGS " -Wstrict-prototypes -Werror"
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
diff --git a/configure.ac b/configure.ac
index 4e4a7097666ef3..93dd489d14b1dd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2432,7 +2432,7 @@ AC_DEFUN([PY_CHECK_CC_WARNING], [
   AS_VAR_PUSHDEF([py_var], [ac_cv_$1_]m4_normalize($2)[_warning])
   AC_CACHE_CHECK([m4_ifblank([$3], [if we can $1 $CC $2 warning], [$3])], 
[py_var], [
     AS_VAR_COPY([py_cflags], [CFLAGS])
-    AS_VAR_APPEND([CFLAGS], ["-W$2 -Werror"])
+    AS_VAR_APPEND([CFLAGS], [" -W$2 -Werror"])
     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
                       [AS_VAR_SET([py_var], [yes])],
                       [AS_VAR_SET([py_var], [no])])

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