move "--import:libbacktrace" to config.nims

This simplifies the `./env.sh nim c -r ...` scenario.

Makefile

@@ -58,12 +58,11 @@ endif
 # must be included after the default target
 -include $(BUILD_SYSTEM_DIR)/makefiles/targets.mk
 
-# "--import" can't be added to config.nims, for some reason
-# "--define:release" implies "--stacktrace:off" and it cannot be added to config.nims either
+# "--define:release" implies "--stacktrace:off" and it cannot be added to config.nims
 ifeq ($(USE_LIBBACKTRACE), 0)
 NIM_PARAMS := $(NIM_PARAMS) -d:debug -d:disable_libbacktrace
 else
-NIM_PARAMS := $(NIM_PARAMS) -d:release --import:libbacktrace
+NIM_PARAMS := $(NIM_PARAMS) -d:release
 endif
 
 #- the Windows build fails on Azure Pipelines if we have Unicode symbols copy/pasted here,
@@ -95,7 +94,7 @@ beacon_chain.nims:
 
 # nim-libbacktrace
 libbacktrace:
-	+ $(MAKE) -C vendor/nim-libbacktrace BUILD_CXX_LIB=0
+	+ $(MAKE) -C vendor/nim-libbacktrace BUILD_CXX_LIB=0 $(HANDLE_OUTPUT)
 
 # Windows 10 with WSL enabled, but no distro installed, fails if "../../nimble.sh" is executed directly
 # in a Makefile recipe but works when prefixing it with `bash`. No idea how the PATH is overridden.

config.nims

@@ -49,8 +49,7 @@ if not defined(macosx):
   if not (defined(windows) and defined(i386)) and not defined(disable_libbacktrace):
     # light-weight stack traces using libbacktrace and libunwind
     --define:nimStackTraceOverride
-    # "--import:libbacktrace" is added to NIM_PARAMS inside the Makefile,
-    # because it doesn't work in here ("Error: undeclared identifier: 'copyMem'", like it kicks in in some other NimScript file)
+    switch("import", "libbacktrace")
 
 --define:nimOldCaseObjects # https://github.com/status-im/nim-confutils/issues/9
 

vendor/nim-libbacktrace

@@ -1 +1 @@
-Subproject commit 3b29eed05a204e4efe5b54a50dc4cbe2dfd38c1b
+Subproject commit da216986c635599dccffa2e71eabad03653e5aef