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BUILD: makefile: also list per-option settings in 'make opts'

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Thanks to the generic naming of the build options, it's now relatively
easy to enumerate all _CFLAGS and _LDFLAGS for defined USE_* options.
That was added to the first line of 'make opts', but is only listed for
enabled options, non-empty variables or cmd-line defined variables.
This commit is contained in:
Willy Tarreau 2022-12-23 17:29:11 +01:00
parent 6e70a3986c
commit 23078c8f2f
1 changed files with 20 additions and 4 deletions
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24
Makefile
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@ -63,7 +63,10 @@
#
# Options can be forced by specifying "USE_xxx=1" or can be disabled by using
# "USE_xxx=" (empty string). The list of enabled and disabled options for a
# given TARGET is enumerated at the end of "make help".
# given TARGET is enumerated at the end of "make help". Most of these options
# support specific xxx_CFLAGS and/or xxx_LDFLAGS that can be individually
# forced. The currently active ones for a given set of options are listed in
# "make opts USE_xxx=1 ...".
#
# Variables useful for packagers :
# CC is set to "cc" by default and is used for compilation only.
@ -875,7 +878,8 @@ all:
@echo " USE_LUA=1 - Support for dynamic processing using Lua"
@echo
@echo "Use 'make help' to print a full explanation of supported targets"
@echo "and features."
@echo "and features, and 'make ... opts' to show the variables in use"
@echo "for a given set of build options, in a reusable form."
@echo
@exit 1
else
@ -1110,7 +1114,9 @@ update-version:
echo "$(SUBVERS)" > SUBVERS
echo "$(VERDATE)" > VERDATE
# just display the build options
# just display the build options. The "USE_*" options and their respective
# settings are also listed if they're explicitly set on the command line, or if
# they are not empty. Implicit "USE_*" are not listed.
opts:
@echo -n 'Using: '
@echo -n 'TARGET="$(strip $(TARGET))" '
@ -1120,7 +1126,17 @@ opts:
@echo -n 'ARCH_FLAGS="$(strip $(ARCH_FLAGS))" '
@echo -n 'CPU_CFLAGS="$(strip $(CPU_CFLAGS))" '
@echo -n 'DEBUG_CFLAGS="$(strip $(DEBUG_CFLAGS))" '
@echo "$(strip $(BUILD_OPTIONS))"
@#echo "$(strip $(BUILD_OPTIONS))"
@$(foreach opt,$(enabled_opts),\
$(if $(subst command line,,$(origin USE_$(opt))),,\
echo -n 'USE_$(opt)=$(USE_$(opt)) ';) \
$(if $(subst command line,,$(origin $(opt)_CFLAGS)),\
$(if $($(opt)_CFLAGS),echo -n '$(opt)_CFLAGS="$($(opt)_CFLAGS)" ';),\
echo -n '$(opt)_CFLAGS="$($(opt)_CFLAGS)" ';) \
$(if $(subst command line,,$(origin $(opt)_LDFLAGS)),\
$(if $($(opt)_LDFLAGS),echo -n '$(opt)_LDFLAGS="$($(opt)_LDFLAGS)" ';),\
echo -n '$(opt)_LDFLAGS="$($(opt)_LDFLAGS)" ';))
@echo
@echo 'COPTS="$(strip $(COPTS))"'
@echo 'LDFLAGS="$(strip $(LDFLAGS))"'
@echo 'LDOPTS="$(strip $(LDOPTS))"'