From 9bf3b68e118a749ab87f52649fd56aca059470e8 Mon Sep 17 00:00:00 2001 From: Mark Eggleston Date: Tue, 16 Apr 2019 09:09:12 +0100 Subject: [PATCH 16/16] Suppress warning with -Wno-overwrite-recursive The message "Warning: Flag '-fno-automatic' overwrites '-frecursive'" is output by default when -fno-automatic and -frecursive are used together. It warns that recursion may be broken, however if all the relavent variables in the recursive procedure have automatic attributes the warning is unnecessary so -Wno-overwrite-recursive can be used to suppress it. This will allow compilation when warnings are regarded as errors. Suppress warning with -Wno-overwrite-recursive --- gcc/fortran/lang.opt | 4 ++++ gcc/fortran/options.c | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/gcc/fortran/lang.opt b/gcc/fortran/lang.opt index dca3fd27aa3..e5074f614e3 100644 --- a/gcc/fortran/lang.opt +++ b/gcc/fortran/lang.opt @@ -293,6 +293,10 @@ Wopenmp-simd Fortran ; Documented in C +Woverwrite-recursive +Fortran Warning Var(warn_overwrite_recursive) Init(1) +Warn that -fno-automatic may break recursion. + Wpedantic Fortran ; Documented in common.opt diff --git a/gcc/fortran/options.c b/gcc/fortran/options.c index f417f48f6a7..6cbc64bf1ae 100644 --- a/gcc/fortran/options.c +++ b/gcc/fortran/options.c @@ -418,7 +418,7 @@ gfc_post_options (const char **pfilename) && flag_max_stack_var_size != 0) gfc_warning_now (0, "Flag %<-fno-automatic%> overwrites %<-fmax-stack-var-size=%d%>", flag_max_stack_var_size); - else if (!flag_automatic && flag_recursive) + else if (!flag_automatic && flag_recursive && warn_overwrite_recursive) gfc_warning_now (0, "Flag %<-fno-automatic%> overwrites %<-frecursive%>"); else if (!flag_automatic && flag_openmp) gfc_warning_now (0, "Flag %<-fno-automatic%> overwrites %<-frecursive%> implied by " -- 2.11.0