1. Compile the C file, an executable file generated elf source h1.c
#include <stdio.h> void hellofirst(void)
{
printf("The first hello! \n");
}
h2.c source file
#include <stdio.h> void hellosecond(void)
{
printf("The second hello! \n");
}
hello.c source file
#include <stdio.h> void hellosecond(void); void hellofirst(void);
int main(int argc, char *argv[])
{
hellofirst(); hellosecond(); return(0);
}
Compile more than three files, there are several ways:
method 1:
[arm@localhost gcc]#armlinuxgcc c h1.c [arm@localhost gcc]#armlinuxgcc c h2.c
[arm@localhost gcc]#armlinuxgcc o hello hello.c h1.o h2.o
Method 2:
[arm@localhost gcc]#armlinuxgcc c h1.c h2.c [arm@localhost gcc]#armlinuxgcc o hello hello.c h1.o h2.o 方法 3:
[arm@localhost gcc]#armlinuxgcc c o h1.o h1.c
[arm@localhost gcc]#armlinuxgcc c o h1.o h1.c [arm@localhost gcc]#armlinuxgcc o hello hello.c h1.o h2.o 方法 4：
[arm@localhost gcc]#armlinuxgcc o hello hello.c h1.c h2.c
c: compile only unconnected.
o: compiling and connected.
2. When generating a preprocessed file depends upon a result of the macro in the source file, is appropriate.
[arm@localhost gcc]#armlinuxgcc E h1.i h1.c
E: generating a preprocessed file.
3. Generate a dynamic library
DLL at runtime libraries needed.
[arm@localhost gcc]#armlinuxgcc c fpic h1.c h2.c [arm@localhost gcc]#armlinuxgcc shared h1.o h2.o o hello.so [arm@localhost gcc]#armlinuxgcc o hello hello.c hello.so
Hello.so copied to the in / lib target board, copying the executable file in / tmp target board, the target board running hello.
#/tmp/hello
Or copy hello.so hello together and to the / tmp target, and set the environment variable LD_LIBRARY_PATH
#export LD_LIBRARY_PATH =/tmp:$LD_LIBRARY_PATH
#/tmp/hello