[PATCH 3/6] go: correctly set debug-prefix-map and build directory

[Alexander Kanavin <alex.kanavin@gmail.com>]

Go has its own system for creating temporary build
sub-directories with randomized names, and setting
up debug-prefix-map on the fly to prevent those
directories leaking into target binaries. OE's own
settings were clashing with it, so this change
carefully avoids the two stepping on each other.

Additionally, the top level build directory cannot
be named 'go-something'.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
---
 meta/classes/go.bbclass                 |  2 +-
 meta/recipes-devtools/go/go-common.inc  |  2 +-
 meta/recipes-devtools/go/go-runtime.inc |  7 ++++++-
 meta/recipes-devtools/go/go-target.inc  | 10 ++++++++++
 4 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/meta/classes/go.bbclass b/meta/classes/go.bbclass
index 5c1fdd7d5f..9c4c92bffd 100644
--- a/meta/classes/go.bbclass
+++ b/meta/classes/go.bbclass
@@ -67,7 +67,7 @@ GO_INSTALL_FILTEROUT ?= "${GO_IMPORT}/vendor/"
 
 B = "${WORKDIR}/build"
 export GOPATH = "${B}"
-export GOTMPDIR ?= "${WORKDIR}/go-tmp"
+export GOTMPDIR ?= "${WORKDIR}/build-tmp"
 GOTMPDIR[vardepvalue] = ""
 
 python go_do_unpack() {
diff --git a/meta/recipes-devtools/go/go-common.inc b/meta/recipes-devtools/go/go-common.inc
index 5bbf35b787..83f8db7b39 100644
--- a/meta/recipes-devtools/go/go-common.inc
+++ b/meta/recipes-devtools/go/go-common.inc
@@ -23,7 +23,7 @@ INHIBIT_PACKAGE_DEBUG_SPLIT = "1"
 SSTATE_SCAN_CMD = "true"
 
 export GOROOT_OVERRIDE = "1"
-export GOTMPDIR ?= "${WORKDIR}/go-tmp"
+export GOTMPDIR ?= "${WORKDIR}/build-tmp"
 GOTMPDIR[vardepvalue] = ""
 export CGO_ENABLED = "1"
 
diff --git a/meta/recipes-devtools/go/go-runtime.inc b/meta/recipes-devtools/go/go-runtime.inc
index 617e6b5414..a08d44dd3a 100644
--- a/meta/recipes-devtools/go/go-runtime.inc
+++ b/meta/recipes-devtools/go/go-runtime.inc
@@ -2,10 +2,15 @@ DEPENDS = "virtual/${TUNE_PKGARCH}-go go-native"
 DEPENDS:class-nativesdk = "virtual/${TARGET_PREFIX}go-crosssdk"
 PROVIDES = "virtual/${TARGET_PREFIX}go-runtime"
 
+DEBUG_PREFIX_MAP = "\
+                     -fdebug-prefix-map=${STAGING_DIR_HOST}= \
+                     -fdebug-prefix-map=${STAGING_DIR_NATIVE}= \
+"
+
 export CGO_CFLAGS = "${CFLAGS}"
 export CGO_CPPFLAGS = "${CPPFLAGS}"
 export CGO_CXXFLAGS = "${CXXFLAGS}"
-export CGO_LDFLAGS = "${LDFLAGS}"
+export CGO_LDFLAGS = "-Wl,-O1 ${TARGET_LINK_HASH_STYLE} ${ASNEEDED} ${SECURITY_LDFLAGS}"
 export GOCACHE = "${B}/.cache"
 
 GO_EXTLDFLAGS ?= "${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS} ${LDFLAGS}"
diff --git a/meta/recipes-devtools/go/go-target.inc b/meta/recipes-devtools/go/go-target.inc
index 47b4411d54..51f1b79cc3 100644
--- a/meta/recipes-devtools/go/go-target.inc
+++ b/meta/recipes-devtools/go/go-target.inc
@@ -1,6 +1,16 @@
 DEPENDS = "virtual/${TUNE_PKGARCH}-go go-native"
 DEPENDS:class-nativesdk = "virtual/${TARGET_PREFIX}go-crosssdk go-native"
 
+DEBUG_PREFIX_MAP = "\
+                     -fdebug-prefix-map=${STAGING_DIR_HOST}= \
+                     -fdebug-prefix-map=${STAGING_DIR_NATIVE}= \
+"
+
+export CGO_CFLAGS = "${CFLAGS}"
+export CGO_CPPFLAGS = "${CPPFLAGS}"
+export CGO_CXXFLAGS = "${CXXFLAGS}"
+export CGO_LDFLAGS = "-Wl,-O1 ${TARGET_LINK_HASH_STYLE} ${ASNEEDED} ${SECURITY_LDFLAGS}"
+
 export GOCACHE = "${B}/.cache"
 GO_LDFLAGS = ""
 GO_LDFLAGS:class-nativesdk = "-linkmode external"
-- 
2.20.1