GCC makefile不接受-std = c99 -lm [英] GCC makefile doesn't accept -std=c99 -lm

问题描述

我使用gcc编译器遇到了我的makefile问题。如果我直接使用gcc：

  gcc -std = c99 -lm tm.c tm_coins.c tm_options.c tm_stock.c tm_utility.c -o tm -Wall -pedantic 
  

一切正常。我需要-std-c99和-lm。

但是，我被告知使用makefile。这是我的make文件：

  CFLAGS = -ansi -Wall -pedantic 
 LFLAGS = -std = c99 -lm 
 CC = gcc 
全部：tm 
 tm：tm.o tm_coins.o tm_options.o tm_stock.o tm_utility.o 
 $（CC）$（LFLAGS）tm.o tm_coins.o tm_options.o tm_stock.o tm_utility.o -o tm $（CFLAGS）
 
 tm.o：tm.h tm.c 
 $（CC）$（LFLAGS）$ （CFLAGS）-c tm.c 
 
 tm_coins.o：tm_coins.h tm_coins.c 
 $（CC）$（LFLAGS）$（CFLAGS）-c tm_coins.c 
 
 tm_options：tm_options.h tm_options.c 
 $（CC）$（LFLAGS）$（CFLAGS）-c tm_options.c 
 
 tm_stock：tm_stock.h tm_stock.c 
 $（CC）$（LFLAGS）$（CFLAGS）-c tm_stock.c 
 
 tm_utility：tm_utility.h tm_utility.c 
 $（CC）$（LFLAGS）$ （CFLAGS）-c tm_utility.c 
  

使用上面的makefile，我会得到以下错误。我的理解是-std = c99和-lm不起作用。 （看下面的第一行：-std = c99和-lm不存在）

  gcc -ansi -Wall -pedantic -c -o tm_options.o tm_options.c 
 tm_options.c：在函数'purchase_ticket'中：
 tm_options.c：37：错误：'/'令牌之前的期望表达式
 tm_options.c ：52：error：'/'前的期望表达式
 tm_options.c：102：警告：ISO C90禁止混合声明和代码
 tm_options.c：函数'display_tickets'：
 tm_options .c：239：错误：'/'令牌之前的预期表达式
 tm_options.c：函数'add_ticket'：
 tm_options.c：285：错误：'/'令牌之前的预期表达式
 tm_options.c：303：错误：'/'标记之前的预期表达式
 tm_options.c：314：警告：ISO C90禁止混合声明和代码
 tm_options.c：函数'delete_ticket'：
 tm_options.c：387：错误：'/'令牌之前的预期表达式
 tm_options.c：405：错误：'/'之前的预期表达式令牌
 tm_options.c：函数'display_coins'：
 tm_options.c：461：错误：'/'令牌之前的预期表达式
 tm_options.c：函数'restock_tickets'：
 tm_options.c：501：错误：'/'令牌之前的期望表达式
 tm_options.c：函数'restock_coins'：
 tm_options.c：526：错误：'/'令牌之前的预期表达式
 tm_options.c：函数'save_data'：
 tm_options.c：555：警告：ISO C90禁止混合声明和代码
  

哪里会出错？ 您不希望 LFLAGS 编译命令 - 在 CFLAGS 中放入 -std = c99 - makefile应该更像这样：

  CFLAGS = -ansi -Wall -pedantic -std = c99 
 LFLAGS = -lm 
 CC = gcc 
 
全部：tm 
 
 tm：tm.o tm_coins.o tm_options.o tm_stock.o tm_utility.o 
 $（CC）$（LFLAGS）tm.o tm_coins。 o tm_options.o tm_stock.o tm_utility.o -o tm 
 
 tm.o：tm.h tm.c 
 $（CC）$（CFLAGS）-c tm.c 
 
 tm_coins.o：tm_coins.h tm_coins.c 
 $（CC）$（CFLAGS）-c tm_coins.c 
 
 tm_options.o：tm_options.h tm_options。 c 
 $（CC）$（CFLAGS）-c tm_options.c 
 
 tm_stock.o：tm_stock.h tm_stock.c 
 $（CC）$（CFLAGS）-c tm_stock.c 
 
 tm_utility.o：tm_utility.h tm_utility.c 
 $（CC）$（CFLAGS）-c tm_utility.c 
  

（我也添加了缺少的.o后缀作为pointe d出自Magnus。）

I am having problem with my makefile with gcc compiler. If I use gcc directly as:

gcc -std=c99 -lm tm.c tm_coins.c tm_options.c tm_stock.c tm_utility.c -o tm -Wall -pedantic

Everything works fine. I need -std-c99 and -lm.

However, I have been told to use makefile. Here is my make file:

CFLAGS=-ansi -Wall -pedantic
LFLAGS=-std=c99 -lm 
CC=gcc
all:tm
tm:tm.o tm_coins.o tm_options.o tm_stock.o tm_utility.o
    $(CC) $(LFLAGS) tm.o tm_coins.o tm_options.o tm_stock.o tm_utility.o -o tm $(CFLAGS)

tm.o: tm.h tm.c
    $(CC) $(LFLAGS) $(CFLAGS) -c tm.c

tm_coins.o:tm_coins.h tm_coins.c
    $(CC) $(LFLAGS) $(CFLAGS) -c tm_coins.c

tm_options:tm_options.h tm_options.c
    $(CC) $(LFLAGS) $(CFLAGS) -c tm_options.c

tm_stock:tm_stock.h tm_stock.c
    $(CC) $(LFLAGS) $(CFLAGS) -c tm_stock.c

tm_utility:tm_utility.h tm_utility.c
    $(CC) $(LFLAGS) $(CFLAGS) -c tm_utility.c

With above makefile I get below errors. My understanding is that -std=c99 and -lm doesn't work. (look at the first line below. -std=c99 and -lm are not there)

gcc -ansi -Wall -pedantic   -c -o tm_options.o tm_options.c
tm_options.c: In function ‘purchase_ticket’:
tm_options.c:37: error: expected expression before ‘/’ token
tm_options.c:52: error: expected expression before ‘/’ token
tm_options.c:102: warning: ISO C90 forbids mixed declarations and code
tm_options.c: In function ‘display_tickets’:
tm_options.c:239: error: expected expression before ‘/’ token
tm_options.c: In function ‘add_ticket’:
tm_options.c:285: error: expected expression before ‘/’ token
tm_options.c:303: error: expected expression before ‘/’ token
tm_options.c:314: warning: ISO C90 forbids mixed declarations and code
tm_options.c: In function ‘delete_ticket’:
tm_options.c:387: error: expected expression before ‘/’ token
tm_options.c:405: error: expected expression before ‘/’ token
tm_options.c: In function ‘display_coins’:
tm_options.c:461: error: expected expression before ‘/’ token
tm_options.c: In function ‘restock_tickets’:
tm_options.c:501: error: expected expression before ‘/’ token
tm_options.c: In function ‘restock_coins’:
tm_options.c:526: error: expected expression before ‘/’ token
tm_options.c: In function ‘save_data’:
tm_options.c:555: warning: ISO C90 forbids mixed declarations and code

Where would be the error? Thanks in advance.

解决方案

You don't want LFLAGS in the compile commands anyway - put -std=c99 in CFLAGS - the makefile should be more like this:

CFLAGS = -ansi -Wall -pedantic -std=c99
LFLAGS = -lm 
CC = gcc

all: tm

tm: tm.o tm_coins.o tm_options.o tm_stock.o tm_utility.o
    $(CC) $(LFLAGS) tm.o tm_coins.o tm_options.o tm_stock.o tm_utility.o -o tm

tm.o: tm.h tm.c
    $(CC) $(CFLAGS) -c tm.c

tm_coins.o: tm_coins.h tm_coins.c
    $(CC) $(CFLAGS) -c tm_coins.c

tm_options.o: tm_options.h tm_options.c
    $(CC) $(CFLAGS) -c tm_options.c

tm_stock.o: tm_stock.h tm_stock.c
    $(CC) $(CFLAGS) -c tm_stock.c

tm_utility.o: tm_utility.h tm_utility.c
    $(CC) $(CFLAGS) -c tm_utility.c

(I've also added the missing .o suffixes as pointed out by Magnus.)

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