StrixOS/build_soong
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add -faddrsig to ClangExtraCflags

Browse Source 
Emit address-significance table which allows linker to perform safe ICF.
Clang does not emit the table by default on Android since NDK still uses
GNU binutils.

With the flag, binary size is decreased. For Marlin:
               -fno-addrsig  -faddrsig  diff
/system/bin    28012K        27108K     -3.33%
/system/lib    88220K        86964K     -1.44%
/system/lib64  151936K       148108K    -2.58%

Test: m checkbuild
Bug: 128940110
Change-Id: I99511f038a6d4b88b5c849a0f8943c24731ab6ea
This commit is contained in:
Yi Kong
2019-03-19 20:05:05 -07:00
parent bb3fe2fc85
commit a32b5e6a6b
1 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
cc/config/clang.go
View File

@@ -97,6 +97,10 @@ func init() {
pctx.StaticVariable("ClangExtraCflags", strings.Join([]string{
"-D__compiler_offsetof=__builtin_offsetof",
// Emit address-significance table which allows linker to perform safe ICF. Clang does
// not emit the table by default on Android since NDK still uses GNU binutils.
"-faddrsig",
// -Wimplicit-fallthrough is not enabled by -Wall.
"-Wimplicit-fallthrough",