我下载了AESCrypt库以便与MingW进行编译:
https://github.com/paulej/AESCrypt/tree/master/Windows

我收到此错误消息:

C:\Users\MyPC\AppData\Local\Temp\cclSPvvW.o:aescrypt.c:(.text+0xa2): undefined re
ference to `sha256_starts(sha256_context*)'
C:\Users\MyPC\AppData\Local\Temp\cclSPvvW.o:aescrypt.c:(.text+0xc0): undefined re
ference to `sha256_update(sha256_context*, unsigned char*, unsigned long)'
C:\Users\MyPC\AppData\Local\Temp\cclSPvvW.o:aescrypt.c:(.text+0x815): undefined r
eference to `aes_encrypt(aes_context*, unsigned char*, unsigned char*)'
C:\Users\MyPC\AppData\Local\Temp\cclSPvvW.o:aescrypt.c:(.text+0x829): undefined r
eference to `sha256_update(sha256_context*, unsigned char*, unsigned long)'
C:/Program Files (x86)/mingw-w64/i686-6.1.0-posix-dwarf-rt_v5-rev1/mingw32/bin/.
./lib/gcc/i686-w64-mingw32/6.1.0/../../../../i686-w64-mingw32/lib/../lib/libming
w32.a(lib32_libmingw32_a-crt0_c.o):crt0_c.c:(.text.startup+0x39): undefined refe
rence to `WinMain@16'
collect2.exe: error: ld returned 1 exit status


我在Windows 7 x64上,正在使用MingW-w64 6.1.0

最佳答案

这种错误意味着您忘记了链接包含缺少符号代码的文件。通常是.o或.lib / .a文件。

在您的情况下,符号之一是:sha256_starts(sha256_context *),可能在sha256.o中。检查实际的链接命令,并确保它包含此文件或包含该文件的库。

这样的makefile应该可以解决问题:

COMP = gcc
RM = rm -f
OBJS = aes.o sha256.o stdafx.o AESCrypt.o AESCryptShellExt.o AESCryptWorkerThreads.o BufferedFile.o ErrorHandling.o PasswdDialog.o ProgressDialog.o
LDFLAGS = -mwindows
SERVERLDFLAGS =
TARGET = aes.exe

all : $(TARGET)

$(TARGET) : $(OBJS)
    $(COMP) $(LDFLAGS) $(DEBUGFLAGS) -o $(TARGET) $^

clean :
    $(RM) *.o

%.o : %.c %.h
    $(COMP) $(CFLAGS) -c $<

%.o : %.cpp %.h
    $(COMP) $(CFLAGS) -c $<

10-08 05:38