# CONFIG.Common.linuxCommon
#
# Definitions for linux target builds
# Sites may override these definitions in CONFIG_SITE.Common.linuxCommon
#-------------------------------------------------------

# Include definitions common to all Unix targets
include $(CONFIG)/os/CONFIG.Common.UnixCommon

OS_CLASS = Linux

# Define _GNU_SOURCE and _DEFAULT_SOURCE for maximum portability
POSIX_CPPFLAGS = -D_GNU_SOURCE -D_DEFAULT_SOURCE
POSIX_LDLIBS = -lpthread

OP_SYS_CPPFLAGS += -Dlinux
OP_SYS_LDLIBS += -lrt -ldl
# Use -rdynamic to maximize symbols available for stacktrace
OP_SYS_LDFLAGS += -rdynamic

# Linker flags for static & shared-library builds
STATIC_LDFLAGS_YES= -Wl,-Bstatic
STATIC_LDFLAGS_NO=
STATIC_LDLIBS_YES= -Wl,-Bdynamic

# Set runtime path for shared libraries if LINKER_USE_RPATH=YES
SHRLIBDIR_RPATH_LDFLAGS_YES = $(subst $(abspath $(LINKER_ORIGIN_ROOT)),$(FINAL_LOCATION),$(SHRLIB_DEPLIB_DIRS:%=-Wl,-rpath,%))
SHRLIBDIR_RPATH_LDFLAGS_ORIGIN = $(shell $(MAKERPATH) -O '\$$ORIGIN' -F $(FINAL_DIR) -R $(LINKER_ORIGIN_ROOT) $(SHRLIB_DEPLIB_DIRS))
SHRLIBDIR_LDFLAGS += \
    $(SHRLIBDIR_RPATH_LDFLAGS_$(LINKER_USE_RPATH))

# Set runtime path for products if LINKER_USE_RPATH=YES
PRODDIR_RPATH_LDFLAGS_YES = $(subst $(abspath $(LINKER_ORIGIN_ROOT)),$(FINAL_LOCATION),$(PROD_DEPLIB_DIRS:%=-Wl,-rpath,%))
PRODDIR_RPATH_LDFLAGS_ORIGIN = $(shell $(MAKERPATH) -O '\$$ORIGIN' -F $(FINAL_DIR) -R $(LINKER_ORIGIN_ROOT) $(PROD_DEPLIB_DIRS))
PRODDIR_LDFLAGS += \
    $(PRODDIR_RPATH_LDFLAGS_$(LINKER_USE_RPATH))

# Make sure hosts tools find their libraries during build even if
# FINAL_LOCATION differs from INSTALL_LOCATION
ifneq ($(LINKER_USE_RPATH:NO=),)
ifeq ($(T_A),$(EPICS_HOST_ARCH))
ifneq ($(FINAL_LOCATION:$(INSTALL_LOCATION)=),)
export LD_LIBRARY_PATH:=$(LD_LIBRARY_PATH:%=%:)$(INSTALL_LIB)
endif
endif
endif

# Link libraries controlled by COMMANDLINE_LIBRARY
# The newest Linux versions only need readline, older ones need both
# readline and ncurses, and the oldest need readline and curses
LDLIBS_READLINE = -lreadline
LDLIBS_READLINE_NCURSES = -lreadline -lncurses
LDLIBS_READLINE_CURSES = -lreadline -lcurses

#--------------------------------------------------
# Allow site overrides
-include $(CONFIG)/os/CONFIG_SITE.Common.linuxCommon
-include $(CONFIG)/os/CONFIG_SITE.$(EPICS_HOST_ARCH).linuxCommon