Add build define to manually enable -rdynamic LD flag

programs/Makefile

@@ -40,8 +40,6 @@ CPPFLAGS+= -I$(ZSTDDIR) -I$(ZSTDDIR)/common -I$(ZSTDDIR)/compress \
            -DXXH_NAMESPACE=ZSTD_
 ifeq ($(OS),Windows_NT)   # MinGW assumed
 CPPFLAGS   += -D__USE_MINGW_ANSI_STDIO   # compatibility with %zu formatting
-else
-DEBUGFLAGS_LD+= -rdynamic  # Enable backtrace symbol names for Linux/Darwin
 endif
 CFLAGS  ?= -O3
 DEBUGFLAGS+=-Wall -Wextra -Wcast-qual -Wcast-align -Wshadow \
@@ -134,6 +132,15 @@ else
 LZ4_MSG := $(NO_LZ4_MSG)
 endif
 
+# enable backtrace symbol names for Linux/Darwin
+ALL_SYMBOLS := 0
+ifeq (,$(filter Windows%, $(OS)))
+ifeq ($(ALL_SYMBOLS), 1)
+DEBUGFLAGS_LD+=-rdynamic
+endif
+endif
+
+
 .PHONY: default
 default: zstd-release