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Use zstd to compress debug info in cc libraries

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We can save a significant amount of disk space by compressing
debug info in `lld` cc builds. This change configures a build
flag to instruct lld to compress debug info when building cc
libraries. Rather than adding a global config we add this to
each target individually to avoid linker failures on windows
cross build targets.

Test: m
Bug: 305277519

Change-Id: I4ab3d47fb0de7e31a39fb671cccde1acee3a2018
This commit is contained in:
Eric Rahm 2023-10-17 19:40:53 +00:00
parent fa0dff576b
commit f52906f194
5 changed files with 28 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
cc/config/arm64_linux_host.go
View file

@ -46,6 +46,10 @@ var (
"-Wl,--no-undefined-version",
}
linuxCrossLldflags = append(linuxCrossLdflags,
"-Wl,--compress-debug-sections=zstd",
)
// Embed the linker into host bionic binaries. This is needed to support host bionic,
// as the linux kernel requires that the ELF interpreter referenced by PT_INTERP be
// either an absolute path, or relative from CWD. To work around this, we extract
@ -60,6 +64,7 @@ var (
func init() {
exportedVars.ExportStringListStaticVariable("LinuxBionicArm64Cflags", linuxCrossCflags)
exportedVars.ExportStringListStaticVariable("LinuxBionicArm64Ldflags", linuxCrossLdflags)
exportedVars.ExportStringListStaticVariable("LinuxBionicArm64Lldflags", linuxCrossLldflags)
}
// toolchain config for ARM64 Linux CrossHost. Almost everything is the same as the ARM64 Android

12
cc/config/arm_linux_host.go
View file

@ -27,16 +27,24 @@ var (
"-march=armv7a",
}
linuxArmLldflags = append(linuxArmLdflags,
"-Wl,--compress-debug-sections=zstd",
)
linuxArm64Ldflags = []string{}
linuxArm64Lldflags = append(linuxArm64Ldflags,
"-Wl,--compress-debug-sections=zstd",
)
)
func init() {
exportedVars.ExportStringListStaticVariable("LinuxArmCflags", linuxArmCflags)
exportedVars.ExportStringListStaticVariable("LinuxArm64Cflags", linuxArm64Cflags)
exportedVars.ExportStringListStaticVariable("LinuxArmLdflags", linuxArmLdflags)
exportedVars.ExportStringListStaticVariable("LinuxArmLldflags", linuxArmLdflags)
exportedVars.ExportStringListStaticVariable("LinuxArmLldflags", linuxArmLldflags)
exportedVars.ExportStringListStaticVariable("LinuxArm64Ldflags", linuxArm64Ldflags)
exportedVars.ExportStringListStaticVariable("LinuxArm64Lldflags", linuxArm64Ldflags)
exportedVars.ExportStringListStaticVariable("LinuxArm64Lldflags", linuxArm64Lldflags)
exportedVars.ExportStringListStaticVariable("LinuxArmYasmFlags", []string{"-f elf32 -m arm"})
exportedVars.ExportStringListStaticVariable("LinuxArm64YasmFlags", []string{"-f elf64 -m aarch64"})

4
cc/config/global.go
View file

@ -203,7 +203,9 @@ var (
"-Wl,-mllvm,-regalloc-enable-advisor=release",
}
deviceGlobalLldflags = append(deviceGlobalLdflags, commonGlobalLldflags...)
deviceGlobalLldflags = append(append(deviceGlobalLdflags, commonGlobalLldflags...),
"-Wl,--compress-debug-sections=zstd",
)
hostGlobalCflags = []string{}

6
cc/config/x86_linux_bionic_host.go
View file

@ -53,6 +53,10 @@ var (
"--gcc-toolchain=${LinuxBionicGccRoot}",
}
linuxBionicLldflags = append(linuxBionicLdflags,
"-Wl,--compress-debug-sections=zstd",
)
// Embed the linker into host bionic binaries. This is needed to support host bionic,
// as the linux kernel requires that the ELF interpreter referenced by PT_INTERP be
// either an absolute path, or relative from CWD. To work around this, we extract
@ -71,7 +75,7 @@ const (
func init() {
exportedVars.ExportStringListStaticVariable("LinuxBionicCflags", linuxBionicCflags)
exportedVars.ExportStringListStaticVariable("LinuxBionicLdflags", linuxBionicLdflags)
exportedVars.ExportStringListStaticVariable("LinuxBionicLldflags", linuxBionicLdflags)
exportedVars.ExportStringListStaticVariable("LinuxBionicLldflags", linuxBionicLldflags)
// Use the device gcc toolchain for now
exportedVars.ExportStringStaticVariable("LinuxBionicGccVersion", x86_64GccVersion)

6
cc/config/x86_linux_host.go
View file

@ -59,6 +59,10 @@ var (
"--gcc-toolchain=${LinuxGccRoot}",
}
linuxLldflags = append(linuxLdflags,
"-Wl,--compress-debug-sections=zstd",
)
linuxGlibcLdflags = []string{
"--sysroot ${LinuxGccRoot}/sysroot",
}
@ -138,7 +142,7 @@ func init() {
exportedVars.ExportStringListStaticVariable("LinuxCflags", linuxCflags)
exportedVars.ExportStringListStaticVariable("LinuxLdflags", linuxLdflags)
exportedVars.ExportStringListStaticVariable("LinuxLldflags", linuxLdflags)
exportedVars.ExportStringListStaticVariable("LinuxLldflags", linuxLldflags)
exportedVars.ExportStringListStaticVariable("LinuxGlibcCflags", linuxGlibcCflags)
exportedVars.ExportStringListStaticVariable("LinuxGlibcLdflags", linuxGlibcLdflags)
exportedVars.ExportStringListStaticVariable("LinuxGlibcLldflags", linuxGlibcLdflags)