[gcc r12-7942] options: Fix "Multiple different help strings" error diagnostic

[gcc r12-7942] options: Fix "Multiple different help strings" error diagnostic

[Thomas Schwinge]

https://gcc.gnu.org/g:6c0e2645933449461d44fd2dce4fedf94199838c

commit r12-7942-g6c0e2645933449461d44fd2dce4fedf94199838c
Author: Thomas Schwinge <thomas@codesourcery.com>
Date:   Wed Mar 30 22:22:49 2022 +0200

    options: Fix "Multiple different help strings" error diagnostic
    
    This currently causes a confusing litany, for example:
    
        options.cc:3245:2: error: #error Multiple different help strings for Wunused-result:
         #error Multiple different help strings for Wunused-result:
          ^
        options.cc:3246:2: error: 'Warn' was not declared in this scope
          Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value.
          ^
        options.cc:3246:7: error: expected '}' before 'if'
          Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value.
               ^
        options.cc:3246:7: error: expected ',' or ';' before 'if'
        options.cc:3256:54: error: expected unqualified-id before ',' token
             (unsigned short) -1, 0, CLVC_INTEGER, 0, -1, -1 },
                                                              ^
        [going on for several thousands of lines]
    
    Fixed:
    
        options.cc:3245:2: error: #error Multiple different help strings for Wunused-result:
         #error Multiple different help strings for Wunused-result:
          ^
        options.cc:3246:2: error: #error Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value.
         #error   Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value.
          ^
        options.cc:3247:2: error: #error TEST.
         #error   TEST.
          ^
    
    Fix-up for r187437/commit 71caddc5568f59a5990f39226f60979a7fe953ef
    "optc-gen.awk: Error instead of warning for conflicting help".
    
            gcc/
            * optc-gen.awk <END>: Fix "Multiple different help strings" error
            diagnostic.

Diff:
---
 gcc/optc-gen.awk | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/gcc/optc-gen.awk b/gcc/optc-gen.awk
index f2198b253ad..b51688d284f 100644
--- a/gcc/optc-gen.awk
+++ b/gcc/optc-gen.awk
@@ -316,9 +316,12 @@ for (i = 0; i < n_opts; i++) {
 		flags[i + 1] = flags[i] " " flags[i + 1];
 		if (help[i + 1] == "")
 			help[i + 1] = help[i]
-		else if (help[i] != "" && help[i + 1] != help[i])
+		else if (help[i] != "" && help[i + 1] != help[i]) {
 			print "#error Multiple different help strings for " \
-				opts[i] ":\n\t" help[i] "\n\t" help[i + 1]
+				opts[i] ":"
+			print "#error   " help[i]
+			print "#error   " help[i + 1]
+		}
 				
 		i++;
 		back_chain[i] = "N_OPTS";