diff options
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/features.mk | 37 | ||||
| -rw-r--r-- | scripts/utilities.mak | 180 | ||||
| -rw-r--r-- | scripts/utils.mk | 182 |
3 files changed, 399 insertions, 0 deletions
diff --git a/scripts/features.mk b/scripts/features.mk new file mode 100644 index 0000000..9c7f8c3 --- /dev/null +++ b/scripts/features.mk @@ -0,0 +1,37 @@ +# SPDX-License-Identifier: GPL-2.0 + +# taken from perf which was based on Linux Kbuild +# try-cc +# Usage: option = $(call try-cc, source-to-build, cc-options) +try-cc = $(shell sh -c \ + 'TMP="$(BUILD_OUTPUT)$(TMPOUT).$$$$"; \ + echo "$(1)" | \ + $(CC) -x c - $(2) -o "$$TMP" > /dev/null 2>&1 && echo y; \ + rm -f "$$TMP"') + +define SOURCE_PTRACE +#include <stdio.h> +#include <sys/ptrace.h> + +int main (void) +{ + int ret; + ret = ptrace(PTRACE_ATTACH, 0, NULL, 0); + ptrace(PTRACE_TRACEME, 0, NULL, 0); + ptrace(PTRACE_GETSIGINFO, 0, NULL, NULL); + ptrace(PTRACE_GETEVENTMSG, 0, NULL, NULL); + ptrace(PTRACE_SETOPTIONS, NULL, NULL, + PTRACE_O_TRACEFORK | + PTRACE_O_TRACEVFORK | + PTRACE_O_TRACECLONE | + PTRACE_O_TRACEEXIT); + ptrace(PTRACE_CONT, NULL, NULL, 0); + ptrace(PTRACE_DETACH, 0, NULL, NULL); + ptrace(PTRACE_SETOPTIONS, 0, NULL, + PTRACE_O_TRACEFORK | + PTRACE_O_TRACEVFORK | + PTRACE_O_TRACECLONE | + PTRACE_O_TRACEEXIT); + return ret; +} +endef diff --git a/scripts/utilities.mak b/scripts/utilities.mak new file mode 100644 index 0000000..4852b55 --- /dev/null +++ b/scripts/utilities.mak @@ -0,0 +1,180 @@ +# SPDX-License-Identifier: GPL-2.0 +# This allows us to work with the newline character: +define newline + + +endef +newline := $(newline) + +# nl-escape +# +# Usage: escape = $(call nl-escape[,escape]) +# +# This is used as the common way to specify +# what should replace a newline when escaping +# newlines; the default is a bizarre string. +# +nl-escape = $(if $(1),$(1),m822df3020w6a44id34bt574ctac44eb9f4n) + +# escape-nl +# +# Usage: escaped-text = $(call escape-nl,text[,escape]) +# +# GNU make's $(shell ...) function converts to a +# single space each newline character in the output +# produced during the expansion; this may not be +# desirable. +# +# The only solution is to change each newline into +# something that won't be converted, so that the +# information can be recovered later with +# $(call unescape-nl...) +# +escape-nl = $(subst $(newline),$(call nl-escape,$(2)),$(1)) + +# unescape-nl +# +# Usage: text = $(call unescape-nl,escaped-text[,escape]) +# +# See escape-nl. +# +unescape-nl = $(subst $(call nl-escape,$(2)),$(newline),$(1)) + +# shell-escape-nl +# +# Usage: $(shell some-command | $(call shell-escape-nl[,escape])) +# +# Use this to escape newlines from within a shell call; +# the default escape is a bizarre string. +# +# NOTE: The escape is used directly as a string constant +# in an `awk' program that is delimited by shell +# single-quotes, so be wary of the characters +# that are chosen. +# +define shell-escape-nl +awk 'NR==1 {t=$$0} NR>1 {t=t "$(nl-escape)" $$0} END {printf t}' +endef + +# shell-unescape-nl +# +# Usage: $(shell some-command | $(call shell-unescape-nl[,escape])) +# +# Use this to unescape newlines from within a shell call; +# the default escape is a bizarre string. +# +# NOTE: The escape is used directly as an extended regular +# expression constant in an `awk' program that is +# delimited by shell single-quotes, so be wary +# of the characters that are chosen. +# +# (The bash shell has a bug where `{gsub(...),...}' is +# misinterpreted as a brace expansion; this can be +# overcome by putting a space between `{' and `gsub'). +# +define shell-unescape-nl +awk 'NR==1 {t=$$0} NR>1 {t=t "\n" $$0} END { gsub(/$(nl-escape)/,"\n",t); printf t }' +endef + +# escape-for-shell-sq +# +# Usage: embeddable-text = $(call escape-for-shell-sq,text) +# +# This function produces text that is suitable for +# embedding in a shell string that is delimited by +# single-quotes. +# +escape-for-shell-sq = $(subst ','\'',$(1)) + +# shell-sq +# +# Usage: single-quoted-and-escaped-text = $(call shell-sq,text) +# +shell-sq = '$(escape-for-shell-sq)' + +# shell-wordify +# +# Usage: wordified-text = $(call shell-wordify,text) +# +# For instance: +# +# |define text +# |hello +# |world +# |endef +# | +# |target: +# | echo $(call shell-wordify,$(text)) +# +# At least GNU make gets confused by expanding a newline +# within the context of a command line of a makefile rule +# (this is in constrast to a `$(shell ...)' function call, +# which can handle it just fine). +# +# This function avoids the problem by producing a string +# that works as a shell word, regardless of whether or +# not it contains a newline. +# +# If the text to be wordified contains a newline, then +# an intrictate shell command substitution is constructed +# to render the text as a single line; when the shell +# processes the resulting escaped text, it transforms +# it into the original unescaped text. +# +# If the text does not contain a newline, then this function +# produces the same results as the `$(shell-sq)' function. +# +shell-wordify = $(if $(findstring $(newline),$(1)),$(_sw-esc-nl),$(shell-sq)) +define _sw-esc-nl +"$$(echo $(call escape-nl,$(shell-sq),$(2)) | $(call shell-unescape-nl,$(2)))" +endef + +# is-absolute +# +# Usage: bool-value = $(call is-absolute,path) +# +is-absolute = $(shell echo $(shell-sq) | grep -q ^/ && echo y) + +# lookup +# +# Usage: absolute-executable-path-or-empty = $(call lookup,path) +# +# (It's necessary to use `sh -c' because GNU make messes up by +# trying too hard and getting things wrong). +# +lookup = $(call unescape-nl,$(shell sh -c $(_l-sh))) +_l-sh = $(call shell-sq,command -v $(shell-sq) | $(call shell-escape-nl,)) + +# is-executable +# +# Usage: bool-value = $(call is-executable,path) +# +# (It's necessary to use `sh -c' because GNU make messes up by +# trying too hard and getting things wrong). +# +is-executable = $(call _is-executable-helper,$(shell-sq)) +_is-executable-helper = $(shell sh -c $(_is-executable-sh)) +_is-executable-sh = $(call shell-sq,test -f $(1) -a -x $(1) && echo y) + +# get-executable +# +# Usage: absolute-executable-path-or-empty = $(call get-executable,path) +# +# The goal is to get an absolute path for an executable; +# the `command -v' is defined by POSIX, but it's not +# necessarily very portable, so it's only used if +# relative path resolution is requested, as determined +# by the presence of a leading `/'. +# +get-executable = $(if $(1),$(if $(is-absolute),$(_ge-abspath),$(lookup))) +_ge-abspath = $(if $(is-executable),$(1)) + +# get-supplied-or-default-executable +# +# Usage: absolute-executable-path-or-empty = $(call get-executable-or-default,variable,default) +# +define get-executable-or-default +$(if $($(1)),$(call _ge_attempt,$($(1)),$(1)),$(call _ge_attempt,$(2))) +endef +_ge_attempt = $(if $(get-executable),$(get-executable),$(call _gea_err,$(2))) +_gea_err = $(if $(1),$(error Please set '$(1)' appropriately)) diff --git a/scripts/utils.mk b/scripts/utils.mk new file mode 100644 index 0000000..7139088 --- /dev/null +++ b/scripts/utils.mk @@ -0,0 +1,182 @@ +# SPDX-License-Identifier: LGPL-2.1 + +# Utils + + PWD := $(shell /bin/pwd) + GOBJ = $(notdir $(strip $@)) + BASE1 = $(notdir $(strip $1)) + BASE2 = $(notdir $(strip $2)) + BASEPWD = $(notdir $(strip $(PWD))) + + +ifeq ($(VERBOSE),1) + Q = + S = +else + Q = @ + S = -s +endif + +# Use empty print_* macros if either SILENT or VERBOSE. +ifeq ($(findstring 1,$(SILENT)$(VERBOSE)),1) + print_compile = + print_app_build = + print_fpic_compile = + print_shared_lib_compile = + print_plugin_obj_compile = + print_plugin_build = + print_install = + print_uninstall = + print_gen = + print_update = + print_descend = + print_clean = +else + print_compile = echo ' COMPILE '$(GOBJ); + print_app_build = echo ' BUILD '$(GOBJ); + print_fpic_compile = echo ' COMPILE FPIC '$(GOBJ); + print_shared_lib_compile = echo ' COMPILE SHARED LIB '$(GOBJ); + print_plugin_obj_compile = echo ' COMPILE PLUGIN OBJ '$(GOBJ); + print_plugin_build = echo ' BUILD PLUGIN '$(GOBJ); + print_static_lib_build = echo ' BUILD STATIC LIB '$(GOBJ); + print_install = echo ' INSTALL '$1' to $(DESTDIR_SQ)$2'; + print_uninstall = echo ' UNINSTALL $(DESTDIR_SQ)$1'; + print_gen = echo ' GEN '$(GOBJ); + print_update = echo ' UPDATE '$(GOBJ); + print_descend = echo ' DESCEND '$(BASE1) $(BASE2); + print_clean = echo ' CLEAN '$(BASEPWD); +endif + +do_fpic_compile = \ + ($(print_fpic_compile) \ + $(CC) -c $(CPPFLAGS) $(CFLAGS) $(EXT) -fPIC $< -o $@) + +do_compile = \ + ($(if $(GENERATE_PIC), $(do_fpic_compile), \ + $(print_compile) \ + $(CC) -c $(CPPFLAGS) $(CFLAGS) $(EXT) $< -o $@)) + +do_app_build = \ + ($(print_app_build) \ + $(CC) $^ -rdynamic -o $@ $(LDFLAGS) $(CONFIG_LIBS) $(LIBS)) + +do_build_static_lib = \ + ($(print_static_lib_build) \ + if [ -f $@ ]; then \ + mv $@ $@.rm; $(RM) $@.rm; \ + fi; \ + $(AR) rcs $@ $^) + +do_compile_shared_library = \ + ($(print_shared_lib_compile) \ + $(CC) --shared $^ '-Wl,-soname,$(1),-rpath=$$ORIGIN' -o $@ $(LDFLAGS) $(LIBS)) + +do_compile_plugin_obj = \ + ($(print_plugin_obj_compile) \ + $(CC) -c $(CPPFLAGS) $(CFLAGS) -fPIC -o $@ $<) + +do_plugin_build = \ + ($(print_plugin_build) \ + $(CC) $(CFLAGS) $(LDFLAGS) -shared -nostartfiles -o $@ $<) + +do_compile_python_plugin_obj = \ + ($(print_plugin_obj_compile) \ + $(CC) -c $(CPPFLAGS) $(CFLAGS) $(PYTHON_DIR_SQ) $(PYTHON_INCLUDES) -fPIC -o $@ $<) + +do_python_plugin_build = \ + ($(print_plugin_build) \ + $(CC) $< -shared $(LDFLAGS) $(PYTHON_LDFLAGS) -o $@) + +do_clean = \ + ($(print_clean) \ + $(RM) $1) + +do_sample_build = \ + $(Q)($(print_sample_build) \ + $(CC) -o $1 $2 $(CFLAGS) $(LIBTRACEEVENT_STATIC) -ldl) + +do_sample_obj = \ + $(Q)($(print_sample_obj) \ + $(CC) -g -Wall -c $(CFLAGS) -o $1 $2 -I../include/) + +# +# Define a callable command for descending to a new directory +# +# Call by doing: $(call descend,directory[,target]) +# +descend = \ + ($(print_descend) \ + mkdir -p $(obj)/$(BASE1); \ + $(MAKE) $(PRINT_DIR) bdir=$(obj)/$(BASE1) -C $(1) $(2)) + +descend_clean = \ + $(MAKE) $(PRINT_DIR) bdir=$(obj)/$(BASE1) -C $(1) clean + +define make_version.h + (echo '/* This file is automatically generated. Do not modify. */'; \ + echo \#define VERSION_CODE $(shell \ + expr $(VERSION) \* 256 + $(PATCHLEVEL)); \ + echo '#define EXTRAVERSION ' $(EXTRAVERSION); \ + echo '#define VERSION_STRING "'$(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)'"'; \ + echo '#define FILE_VERSION '$(FILE_VERSION); \ + if [ -d $(src)/.git ]; then \ + d=`git diff`; \ + x=""; \ + if [ ! -z "$$d" ]; then x="+"; fi; \ + echo '#define VERSION_GIT "'$(shell \ + git log -1 --pretty=format:"%H" 2>/dev/null)$$x'"'; \ + else \ + echo '#define VERSION_GIT "not-a-git-repo"'; \ + fi \ + ) > $1 +endef + +define update_version.h + ($(call make_version.h, $@.tmp); \ + if [ -r $@ ] && cmp -s $@ $@.tmp; then \ + rm -f $@.tmp; \ + else \ + $(print_update) \ + mv -f $@.tmp $@; \ + fi); +endef + +define update_dir + (echo $1 > $@.tmp; \ + if [ -r $@ ] && cmp -s $@ $@.tmp; then \ + rm -f $@.tmp; \ + else \ + $(print_update) \ + mv -f $@.tmp $@; \ + fi); +endef + +define build_prefix + (echo $1 > $@.tmp; \ + if [ -r $@ ] && cmp -s $@ $@.tmp; then \ + rm -f $@.tmp; \ + else \ + $(print_update) \ + mv -f $@.tmp $@; \ + fi); +endef + +define do_install_mkdir + if [ ! -d '$(DESTDIR_SQ)$1' ]; then \ + $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \ + fi +endef + +define do_install + $(print_install) \ + $(call do_install_mkdir,$2); \ + $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2' +endef + +define do_install_pkgconfig_file + if [ -n "${pkgconfig_dir}" ]; then \ + $(call do_install,$(PKG_CONFIG_FILE),$(pkgconfig_dir),644); \ + else \ + (echo Failed to locate pkg-config directory) 1>&2; \ + fi +endef |