[cfe-dev] [PATCH] linker tweaks for OpenBSD

[Brad Smith]

On Fri, Dec 28, 2012 at 06:39:15AM -0500, Rafael Esp??ndola wrote:
> please add a test for the flags being passed down. LGTM with that.

How about this?

> On 28 December 2012 03:05, Brad Smith <brad at comstyle.com> wrote:
> > The attached patch for the OpenBSD linker config copies some bits
> > from the FreeBSD/Linux configs to silence some warnings and allow
> > passing down some feature flags to the linker.
> >
> > --
> > This message has been scanned for viruses and
> > dangerous content by MailScanner, and is
> > believed to be clean.
> >
> >
> > _______________________________________________
> > cfe-dev mailing list
> > cfe-dev at cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
> >
> 
> -- 
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
> 

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

-------------- next part --------------
Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp	(revision 171175)
+++ lib/Driver/Tools.cpp	(working copy)
@@ -4677,6 +4677,14 @@
   const Driver &D = getToolChain().getDriver();
   ArgStringList CmdArgs;
 
+  // Silence warning for "clang -g foo.o -o foo"
+  Args.ClaimAllArgs(options::OPT_g_Group);
+  // and "clang -emit-llvm foo.o -o foo"
+  Args.ClaimAllArgs(options::OPT_emit_llvm);
+  // and for "clang -w foo.o -o foo". Other warning options are already
+  // handled somewhere else.
+  Args.ClaimAllArgs(options::OPT_w);
+
   if ((!Args.hasArg(options::OPT_nostdlib)) &&
       (!Args.hasArg(options::OPT_shared))) {
     CmdArgs.push_back("-e");
@@ -4731,6 +4739,10 @@
   Args.AddAllArgs(CmdArgs, options::OPT_L);
   Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
   Args.AddAllArgs(CmdArgs, options::OPT_e);
+  Args.AddAllArgs(CmdArgs, options::OPT_s);
+  Args.AddAllArgs(CmdArgs, options::OPT_t);
+  Args.AddAllArgs(CmdArgs, options::OPT_Z_Flag);
+  Args.AddAllArgs(CmdArgs, options::OPT_r);
 
   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs);
 
Index: test/Driver/openbsd.c
===================================================================
--- test/Driver/openbsd.c	(revision 171175)
+++ test/Driver/openbsd.c	(working copy)
@@ -7,3 +7,17 @@
 // RUN:   | FileCheck --check-prefix=CHECK-PG %s
 // CHECK-PG: clang{{.*}}" "-cc1" "-triple" "i686-pc-openbsd"
 // CHECK-PG: ld{{.*}}" "-e" "__start" "--eh-frame-hdr" "-Bdynamic" "-dynamic-linker" "{{.*}}ld.so" "-o" "a.out" "{{.*}}crt0.o" "{{.*}}crtbegin.o" "{{.*}}.o" "-lgcc" "-lpthread_p" "-lc_p" "-lgcc" "{{.*}}crtend.o"
+
+// Check that the new linker flags are passed to OpenBSD
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd -r %s -### 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-LD-R %s
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd -t %s -### 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-LD-T %s
+// RUN: %clang -no-canonical-prefixes -target i686-pc-openbsd -Z %s -### 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-LD-Z %s
+// CHECK-LD-R: clang{{.*}}" "-cc1" "-triple" "i686-pc-openbsd"
+// CHECK-LD-R: ld{{.*}}" "-e" "__start" "--eh-frame-hdr" "-Bdynamic" "-dynamic-linker" "{{.*}}ld.so" "-o" "a.out" "{{.*}}crt0.o" "{{.*}}crtbegin.o" "-L{{.*}}" "-r" "{{.*}}.o" "-lgcc" "-lc" "-lgcc" "{{.*}}crtend.o"
+// CHECK-LD-T: clang{{.*}}" "-cc1" "-triple" "i686-pc-openbsd"
+// CHECK-LD-T: ld{{.*}}" "-e" "__start" "--eh-frame-hdr" "-Bdynamic" "-dynamic-linker" "{{.*}}ld.so" "-o" "a.out" "{{.*}}crt0.o" "{{.*}}crtbegin.o" "-L{{.*}}" "-t" "{{.*}}.o" "-lgcc" "-lc" "-lgcc" "{{.*}}crtend.o"
+// CHECK-LD-Z: clang{{.*}}" "-cc1" "-triple" "i686-pc-openbsd"
+// CHECK-LD-Z: ld{{.*}}" "-e" "__start" "--eh-frame-hdr" "-Bdynamic" "-dynamic-linker" "{{.*}}ld.so" "-o" "a.out" "{{.*}}crt0.o" "{{.*}}crtbegin.o" "-L{{.*}}" "-Z" "{{.*}}.o" "-lgcc" "-lc" "-lgcc" "{{.*}}crtend.o"