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Debug Info: set default to gdwarf-2 for Darwin. 

Darwin systems currently do not support dwarf version 3 or above. When we are
ready, we can bump the default to gdwarf-4 for Darwin.

For other systems, the default is dwarf version 3, if everything goes smoothly,
we can bump the version to 4.

rdar://13591116

llvm-svn: 185483
This commit is contained in:
Manman Ren 2013-07-02 23:15:25 +00:00
parent 9046f94271
commit 38db092083
4 changed files with 16 additions and 5 deletions
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9
clang/lib/Driver/Tools.cpp
View File

@ -2521,8 +2521,13 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
else if (A->getOption().matches(options::OPT_gdwarf_4))
CmdArgs.push_back("-gdwarf-4");
else if (!A->getOption().matches(options::OPT_g0) &&
!A->getOption().matches(options::OPT_ggdb0))
CmdArgs.push_back("-g");
!A->getOption().matches(options::OPT_ggdb0)) {
// Default is dwarf-2 for darwin.
if (getToolChain().getTriple().isOSDarwin())
CmdArgs.push_back("-gdwarf-2");
else
CmdArgs.push_back("-g");
}
}
// We ignore flags -gstrict-dwarf and -grecord-gcc-switches for now.

4
clang/test/CodeGen/dwarf-version.c
View File

@ -1,6 +1,8 @@
// RUN: %clang -target x86_64-linux-gnu -gdwarf-2 -S -emit-llvm -o - %s | FileCheck %s
// RUN: %clang -target x86_64-linux-gnu -gdwarf-3 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER3
// RUN: %clang -target x86_64-linux-gnu -gdwarf-4 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER4
// RUN: %clang -target x86_64-linux-gnu -g -S -emit-llvm -o - %s | FileCheck %s --check-prefix=LINUX
// RUN: %clang -target x86_64-apple-darwin -g -S -emit-llvm -o - %s | FileCheck %s --check-prefix=DARWIN
int main (void) {
return 0;
}
@ -8,3 +10,5 @@ int main (void) {
// CHECK: metadata !{i32 2, metadata !"Dwarf Version", i32 2}
// VER3: metadata !{i32 2, metadata !"Dwarf Version", i32 3}
// VER4: metadata !{i32 2, metadata !"Dwarf Version", i32 4}
// LINUX: metadata !{i32 2, metadata !"Dwarf Version", i32 3}
// DARWIN: metadata !{i32 2, metadata !"Dwarf Version", i32 2}

3
clang/test/Driver/clang-g-opts.c
View File

@ -5,5 +5,6 @@
// RUN: %clang -### -S %s -g0 -g 2>&1 | FileCheck --check-prefix=CHECK-WITH-G %s
// CHECK-WITHOUT-G-NOT: "-g"
// CHECK-WITH-G: "-g"
// Can be -gdwarf.
// CHECK-WITH-G: "-g

5
clang/test/Driver/debug-options.c
View File

@ -26,7 +26,8 @@
// RUN: | FileCheck -check-prefix=GIGNORE %s
//
// G: "-cc1"
// G: "-g"
// Can be -gdwarf.
// G: "-g
//
// G_D2: "-cc1"
// G_D2: "-gdwarf-2"
@ -41,7 +42,7 @@
//
// G_ONLY: "-cc1"
// G_ONLY-NOT: "-gline-tables-only"
// G_ONLY: "-g"
// G_ONLY: "-g
// G_ONLY-NOT: "-gline-tables-only"
//
// GLTO_NO: "-cc1"