{"id":1395,"date":"2026-07-16T15:10:58","date_gmt":"2026-07-16T06:10:58","guid":{"rendered":"https:\/\/www.ecoop.net\/memo\/?p=1395"},"modified":"2026-07-26T17:43:38","modified_gmt":"2026-07-26T08:43:38","slug":"makefile-ifeq-ifdef","status":"publish","type":"post","link":"https:\/\/www.ecoop.net\/memo\/archives\/makefile-ifeq-ifdef.html","title":{"rendered":"Makefile\u306e\u6761\u4ef6\u5206\u5c90 ifeq \/ ifdef \u5b8c\u5168\u30ac\u30a4\u30c9"},"content":{"rendered":"<p>Makefile \u3067\u300c\u30c7\u30d0\u30c3\u30b0\u30d3\u30eb\u30c9\u306e\u3068\u304d\u3060\u3051\u30d5\u30e9\u30b0\u3092\u8db3\u3057\u305f\u3044\u300d\u300cOS \u3054\u3068\u306b\u30b3\u30de\u30f3\u30c9\u3092\u5909\u3048\u305f\u3044\u300d\u3068\u3044\u3063\u305f\u5206\u5c90\u3092\u3057\u305f\u3044\u3068\u304d\u4f7f\u3046\u306e\u304c <code>ifeq<\/code> \u3068 <code>ifdef<\/code> \u3067\u3059\u3002\u66f8\u304d\u65b9\u306b\u5c11\u3057\u30af\u30bb\u304c\u3042\u308b\u306e\u3067\u3001\u5b9f\u4f8b\u3064\u304d\u3067\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u6319\u52d5\u306f\u3059\u3079\u3066\u624b\u5143\u306e GNU Make \u3067\u5b9f\u884c\u3057\u3066\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ed5\u69d8\u306e\u8a73\u7d30\u306f <a href=\"https:\/\/www.ecoop.net\/coop\/translated\/GNUMake4.4\/ch07.jp.html\">GNU Make 4.4 \u65e5\u672c\u8a9e\u30de\u30cb\u30e5\u30a2\u30eb \u7b2c7\u7ae0\u300cMakefile\u306e\u6761\u4ef6\u5206\u5c90\u300d<\/a> \u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u306e\u8a18\u4e8b\u306f\u305d\u306e\u5b9f\u4f8b\u7248\u3067\u3059\u3002<\/p>\n<h3>4\u3064\u306e\u6761\u4ef6\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6<\/th>\n<th>\u5206\u5c90\u306e\u6761\u4ef6<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code>ifeq<\/code><\/td>\n<td>2\u3064\u306e\u5024\u304c\u7b49\u3057\u3044<\/td>\n<\/tr>\n<tr>\n<td><code>ifneq<\/code><\/td>\n<td>2\u3064\u306e\u5024\u304c\u7b49\u3057\u304f\u306a\u3044<\/td>\n<\/tr>\n<tr>\n<td><code>ifdef<\/code><\/td>\n<td>\u5909\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\uff08\u7a7a\u3067\u306a\u3044\uff09<\/td>\n<\/tr>\n<tr>\n<td><code>ifndef<\/code><\/td>\n<td>\u5909\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\uff08\u7a7a\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u3044\u305a\u308c\u3082 <code>else<\/code> \u3068 <code>endif<\/code> \u3067\u9589\u3058\u307e\u3059\u3002<code>else<\/code> \u306f\u7701\u7565\u3067\u304d\u307e\u3059\u304c <code>endif<\/code> \u306f\u5fc5\u9808\u3067\u3059\u3002<\/p>\n<h3>ifeq: \u5024\u3092\u6bd4\u8f03\u3057\u3066\u5206\u5c90<\/h3>\n\n\n<!--more-->\n\n\n\n<pre class=\"wp-block-code\"><code>DEBUG ?= 0\n\ncheck:\nifeq ($(DEBUG),1)\n\t@echo \"DEBUG mode ON\"\nelse\n\t@echo \"DEBUG mode OFF\"\nendif<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>make check          # DEBUG mode OFF\nmake check DEBUG=1  # DEBUG mode ON<\/code><\/pre>\n\n\n<p>\u66f8\u5f0f\u306f <code>ifeq (\u50241,\u50242)<\/code> \u3067\u3059\u3002\u30ab\u30c3\u30b3\u3068\u30ab\u30f3\u30de\u306e\u5f62\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30ab\u30f3\u30de\u306e\u524d\u5f8c\u306b\u4f59\u8a08\u306a\u30b9\u30da\u30fc\u30b9\u3092\u5165\u308c\u308b\u3068\u3001\u305d\u306e\u30b9\u30da\u30fc\u30b9\u3082\u6bd4\u8f03\u5bfe\u8c61\u306b\u306a\u3063\u3066\u4e00\u81f4\u3057\u306a\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<blockquote>\n<p>\u3088\u304f\u3042\u308b\u30cf\u30de\u308a: <code>ifeq ($(DEBUG), 1)<\/code> \u3068\u30ab\u30f3\u30de\u5f8c\u306b\u7a7a\u767d\u3092\u5165\u308c\u308b\u3068\u3001<code>DEBUG=1<\/code> \u3067\u3082\u300c<code>1<\/code>\u300d\u3068\u6bd4\u8f03\u3055\u308c\u4e00\u81f4\u3057\u306a\u3044\u3001\u3068\u3044\u3046\u4e8b\u6545\u304c\u8d77\u304d\u307e\u3059\u3002\u30b9\u30da\u30fc\u30b9\u306f\u5165\u308c\u306a\u3044\u306e\u304c\u7121\u96e3\u3067\u3059\u3002<\/p>\n<\/blockquote>\n<p>\u5f15\u7528\u7b26\u3092\u4f7f\u3063\u305f <code>ifeq (\"$(X)\",\"yes\")<\/code> \u3068\u3044\u3046\u66f8\u304d\u65b9\u3082\u3067\u304d\u307e\u3059\u3002\u5024\u306b\u7a7a\u767d\u304c\u542b\u307e\u308c\u308b\u3068\u304d\u306f\u3053\u3061\u3089\u304c\u5b89\u5168\u3067\u3059\u3002<\/p>\n<h3>ifneq: \u7b49\u3057\u304f\u306a\u3044\u3068\u304d<\/h3>\n<p>\u300c\u7a7a\u3067\u306a\u3051\u308c\u3070\u300d\u3092\u8868\u3059\u5b9a\u756a\u306e\u30a4\u30c7\u30a3\u30aa\u30e0\u304c\u3053\u308c\u3067\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code>ifneq ($(EXTRA),)\n\t# EXTRA \u304c\u7a7a\u3067\u306a\u3044\u3068\u304d\u3060\u3051\u5b9f\u884c\u3055\u308c\u308b\nendif<\/code><\/pre>\n\n\n<p><code>ifneq ($(EXTRA),)<\/code> \u306f\u300c<code>EXTRA<\/code> \u3092\u7a7a\u6587\u5b57\u3068\u6bd4\u8f03\u3057\u3066\u3001\u7b49\u3057\u304f\u306a\u3044\uff1d\u4f55\u304b\u5024\u304c\u3042\u308b\u300d\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>ifdef \/ ifndef: \u5909\u6570\u306e\u6709\u7121\u3067\u5206\u5c90<\/h3>\n\n\n<pre class=\"wp-block-code\"><code>greet:\nifdef NAME\n\t@echo \"Hello, $(NAME)\"\nelse\n\t@echo \"NAME is not set\"\nendif<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>make greet           # NAME is not set\nmake greet NAME=Tom  # Hello, Tom<\/code><\/pre>\n\n\n<p><code>ifdef<\/code> \u306f<strong>\u5909\u6570\u540d\u3092\u76f4\u63a5<\/strong>\u66f8\u304d\u307e\u3059\uff08<code>$(NAME)<\/code> \u3067\u306f\u306a\u304f <code>NAME<\/code>\uff09\u3002\u3053\u3053\u304c <code>ifeq<\/code> \u3068\u306e\u9055\u3044\u3067\u3059\u3002<\/p>\n<p>\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001<code>ifdef<\/code> \u306f\u300c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u304b\u300d\u3067\u306f\u306a\u304f\u300c\u5024\u304c\u7a7a\u3067\u306a\u3044\u304b\u300d\u3067\u5224\u5b9a\u3057\u307e\u3059\u3002<code>NAME =<\/code>\uff08\u7a7a\u3067\u5b9a\u7fa9\uff09\u306e\u5834\u5408\u306f <code>ifdef NAME<\/code> \u306f\u507d\u306b\u306a\u308a\u307e\u3059\u3002\u7a7a\u6587\u5b57\u3082\u542b\u3081\u3066\u53b3\u5bc6\u306b\u5224\u5b9a\u3057\u305f\u3044\u30b1\u30fc\u30b9\u306f\u5c11\u306a\u3044\u306e\u3067\u3001\u5b9f\u7528\u4e0a\u306f\u300c\u5024\u304c\u3042\u308b\u304b\u300d\u3067\u899a\u3048\u3066\u304a\u3051\u3070\u5341\u5206\u3067\u3059\u3002<\/p>\n<h3>\u74b0\u5883\u5909\u6570\u30fb\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u5f15\u6570\u3067\u5206\u5c90\u3059\u308b<\/h3>\n<p>make \u306f\u74b0\u5883\u5909\u6570\u3092\u305d\u306e\u307e\u307e\u5909\u6570\u3068\u3057\u3066\u8aad\u307f\u8fbc\u3080\u306e\u3067\u3001\u6761\u4ef6\u5206\u5c90\u3067\u305d\u306e\u307e\u307e\u4f7f\u3048\u307e\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code>build:\nifeq ($(CI),true)\n\t@echo \"CI \u74b0\u5883\u5411\u3051\u30d3\u30eb\u30c9\"\nelse\n\t@echo \"\u30ed\u30fc\u30ab\u30eb\u30d3\u30eb\u30c9\"\nendif<\/code><\/pre>\n\n\n<p>\u74b0\u5883\u5909\u6570 <code>CI<\/code> \u304c <code>true<\/code> \u306e\u3068\u304d\uff08\u591a\u304f\u306e CI \u30b5\u30fc\u30d3\u30b9\u304c\u81ea\u52d5\u3067\u8a2d\u5b9a\u3057\u307e\u3059\uff09\u306b\u5206\u5c90\u3057\u307e\u3059\u3002<\/p>\n<p>\u300c\u305d\u306e\u5909\u6570\u304c\u74b0\u5883\u5909\u6570\u7531\u6765\u304b\u3001Makefile \u5b9a\u7fa9\u304b\u300d\u307e\u3067\u533a\u5225\u3057\u305f\u3044\u3068\u304d\u306f <code>$(origin)<\/code> \u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code>ifeq ($(origin CC),default)\n\t# CC \u304c\u30e6\u30fc\u30b6\u30fc\u672a\u6307\u5b9a\uff08make \u306e\u7d44\u307f\u8fbc\u307f\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\u306e\u3068\u304d\u3060\u3051\u5dee\u3057\u66ff\u3048\u308b\n\tCC := clang\nendif<\/code><\/pre>\n\n\n<p><code>origin<\/code> \u306e\u623b\u308a\u5024\u306f <code>environment<\/code> \/ <code>file<\/code> \/ <code>command line<\/code> \/ <code>default<\/code> \/ <code>undefined<\/code> \u306a\u3069\u3067\u3059\u3002\u5909\u6570\u306e\u7531\u6765\u307e\u3067\u8e0f\u307e\u3048\u305f\u5206\u5c90\u304c\u3067\u304d\u307e\u3059\u3002\u5909\u6570\u306e\u7531\u6765\u306e\u8abf\u3079\u65b9\u306f <a href=\"\/memo\/archives\/makefile-variables-cheatsheet.html\">Makefile\u5909\u6570\u30c1\u30fc\u30c8\u30b7\u30fc\u30c8<\/a> \u306b\u3082\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>OS \u3067\u5206\u5c90\u3059\u308b\u5b9f\u4f8b<\/h3>\n<p><code>uname<\/code> \u306e\u7d50\u679c\u3067 macOS \u3068 Linux \u3092\u5207\u308a\u66ff\u3048\u308b\u3001\u5b9f\u52d9\u3067\u3088\u304f\u3042\u308b\u4f8b\u3067\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code>UNAME := $(shell uname)\n\nifeq ($(UNAME),Darwin)\n\tOPEN := open        # macOS\nelse\n\tOPEN := xdg-open    # Linux\nendif\n\nshow:\n\t$(OPEN) result.html<\/code><\/pre>\n\n\n<p><code>$(shell uname)<\/code> \u306f <code>:=<\/code> \u3067\u53d7\u3051\u308b\u306e\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<code>=<\/code> \u3060\u3068 <code>$(UNAME)<\/code> \u3092\u53c2\u7167\u3059\u308b\u305f\u3073\u306b <code>uname<\/code> \u3092\u5b9f\u884c\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<h3>\u3064\u307e\u305a\u304d\u30dd\u30a4\u30f3\u30c8<\/h3>\n<ul>\n<li><strong>\u6761\u4ef6\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u306f\u30ec\u30b7\u30d4\u3067\u306f\u306a\u3044<\/strong>\u306e\u3067\u3001\u884c\u982d\u306b\u30bf\u30d6\u3092\u5165\u308c\u307e\u305b\u3093\uff08<code>ifeq<\/code> \u7b49\u306f\u30bf\u30d6\u306a\u3057\u3067\u66f8\u304f\uff09\u3002\u30bf\u30d6\u3067\u59cb\u3081\u308b\u3068\u30ec\u30b7\u30d4\u306e\u4e00\u90e8\u3068\u898b\u306a\u3055\u308c\u3066\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li>\u4e00\u65b9\u3001<code>ifeq<\/code> \u306e\u4e2d\u306b\u66f8\u304f\u30ec\u30b7\u30d4\u884c\u306f\u901a\u5e38\u3069\u304a\u308a\u30bf\u30d6\u3067\u59cb\u3081\u307e\u3059\u3002\u4e0a\u306e\u4f8b\u306e\u30a4\u30f3\u30c7\u30f3\u30c8\u306f\u30bf\u30d6\u3067\u3059\u3002<\/li>\n<li><code>else if<\/code> \u3092\u7d9a\u3051\u305f\u3044\u3068\u304d\u306f <code>else ifeq (...)<\/code> \u3068\u66f8\u3051\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n<pre class=\"wp-block-code\"><code>ifeq ($(TARGET),debug)\n\tFLAGS := -g -O0\nelse ifeq ($(TARGET),release)\n\tFLAGS := -O2\nelse\n\tFLAGS :=\nendif<\/code><\/pre>\n\n\n<h3>\u3055\u3044\u3054\u306b<\/h3>\n<p><code>ifeq<\/code> \u306f\u5024\u306e\u6bd4\u8f03\u3001<code>ifdef<\/code> \u306f\u5909\u6570\u306e\u6709\u7121\u3001\u3068\u5f79\u5272\u3092\u5206\u3051\u3066\u899a\u3048\u308b\u3068\u8ff7\u3044\u307e\u305b\u3093\u3002\u4ed5\u69d8\u306e\u5168\u4f53\u50cf\u306f <a href=\"https:\/\/www.ecoop.net\/coop\/translated\/GNUMake4.4\/index.jp.html\">GNU Make 4.4 \u65e5\u672c\u8a9e\u30de\u30cb\u30e5\u30a2\u30eb<\/a> \u306b\u307e\u3068\u307e\u3063\u3066\u3044\u307e\u3059\u3002\u5909\u6570\u307e\u308f\u308a\u3067\u8a70\u307e\u3063\u305f\u3089 <a href=\"\/memo\/archives\/makefile-variables-cheatsheet.html\">Makefile\u5909\u6570\u30c1\u30fc\u30c8\u30b7\u30fc\u30c8<\/a> \u3082\u3069\u3046\u305e\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>Makefile \u3067\u300c\u30c7\u30d0\u30c3\u30b0\u30d3\u30eb\u30c9\u306e\u3068\u304d\u3060\u3051\u30d5\u30e9\u30b0\u3092\u8db3\u3057\u305f\u3044\u300d\u300cOS \u3054\u3068\u306b\u30b3\u30de\u30f3\u30c9\u3092\u5909\u3048\u305f\u3044\u300d\u3068\u3044\u3063\u305f\u5206\u5c90\u3092\u3057\u305f\u3044\u3068\u304d\u4f7f\u3046\u306e\u304c ifeq \u3068 ifdef \u3067\u3059\u3002\u66f8\u304d\u65b9\u306b\u5c11\u3057\u30af\u30bb\u304c\u3042\u308b\u306e\u3067\u3001\u5b9f\u4f8b\u3064\u304d\u3067\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u6319\u52d5 &hellip; <a href=\"https:\/\/www.ecoop.net\/memo\/archives\/makefile-ifeq-ifdef.html\" class=\"more-link\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"screen-reader-text\">Makefile\u306e\u6761\u4ef6\u5206\u5c90 ifeq \/ ifdef \u5b8c\u5168\u30ac\u30a4\u30c9<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[135,155],"tags":[158,163],"class_list":["post-1395","post","type-post","status-publish","format-standard","hentry","category-server","category-dev","tag-gnu-make","tag-makefile"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/1395","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/comments?post=1395"}],"version-history":[{"count":3,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/1395\/revisions"}],"predecessor-version":[{"id":1478,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/1395\/revisions\/1478"}],"wp:attachment":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/media?parent=1395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/categories?post=1395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/tags?post=1395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}