make: shell assignment is a POSIX 202X feature

Austin Group defect report 337 has been accepted, thus making
macro assignment from the output of a shell command (!=) a
POSIX 202X feature.

This was previously implemented as a non-POSIX extension.

1 files changed, 4 insertions, 5 deletions

diff --git a/miscutils/make.c b/miscutils/make.c
index 8e3778461..431ac41d4 100644
--- a/miscutils/make.c
+++ b/miscutils/make.c
@@ -1609,11 +1609,11 @@ input(FILE *fd, int ilevel)
                                                 }
                                                 break;
                                         }
-                                case '!':
-                                        // ':=' and '!=' are non-POSIX extensions.
+                                        // ':=' is a non-POSIX extension.
                                 case '+':
                                 case '?':
-                                        // '+=' and '?=' are from POSIX 202X.
+                                case '!':
+                                        // '+=', '?=' and '!=' are from POSIX 202X.
                                         if (posix)
                                                 break;
                                         eq = q[-1];
@@ -1662,8 +1662,7 @@ input(FILE *fd, int ilevel)
                                 if (rhs != q)
                                         free(rhs);
                                 q = newq;
-                        }
-                        else if (eq == '!') {
+                        } else if (eq == '!') {
                                 char *cmd = expand_macros(q, FALSE);
                                 q = newq = run_command(cmd);
                                 free(cmd);