Use "–defsym" in LDFLAGS

[christoph.p]

Hi!

I’m trying to insert a timestamp in my linker Call. I modified the call to

But the check says:

i586-poky-linux-gcc.exe: error: +%s`: No such file or directory

How to define the symbol with the date?

Thx!

• This topic was modified 7 years, 11 months ago by christoph.p.
• This topic was modified 7 years, 11 months ago by christoph.p.
• This topic was modified 7 years, 11 months ago by christoph.p.
• This topic was modified 7 years, 11 months ago by christoph.p.

[support]

If you are building on Windows, please install MinGW/msys to use the Unix-style commands like ‘date’ and then specify the absolute path to the ‘date.exe’ from the msys directory so that it’s not confused with the Windows ‘date’ command.

[christoph.p]

Ok. I’ve check the command in the windows commandline with

C:\date.exe +%s

which outputs

1466065030

But I don’t know how to specify the LDFLAGS line…

I tried

• -Wl,-gc-sections,–defsym,TIMESTAMP=$(C:\date.exe +%s)
• -Wl,-gc-sections,–defsym,TIMESTAMP=C:\date.exe +%s
• -Wl,-gc-sections,–defsym,TIMESTAMP=$(“C:\date.exe” +%s)
• -Wl,-gc-sections,–defsym,TIMESTAMP=$(“C:\date.exe +%s”)

But nothing worked. I always get

• collect2.exe: error: ld returned 1 exit status
• i586-poky-linux-gcc.exe: error: +%s): No such file or directory
• i586-poky-linux-gcc.exe: error: +%s`: No such file or directory

 

[support]

Hi,

Please try this syntax:

$(shell C:/date.exe +%s)

[christoph.p]

Returns:

[…]
i586-poky-linux-gcc.exe: error: +%s): No such file or directory

[support]

Hi,

OK, please try the following Makefile from the command line:

test:
    gcc -DTIMESTAMP=$(shell C:/mingw/msys/1.0/bin/date.exe +%s) -E test.c -o test.E

You can use it with the following test.c file:

int timestamp = TIMESTAMP;

If this does not work, please let us know the error you get with this simple file. If it does, please compare the syntax here with your Makefile.

[christoph.p]

That gives me:

i586-poky-linux-gcc.exe: error: +%s): No such file or directory

[support]

Looks like you are still trying to use your Makefile with i586-poky-linux-gcc.exe.

In order to isolate the problem please try using the minimal Makefile we provided (with the normal GCC from the MinGW toolchain and make.exe from MinGW as well). If it works, please try explicitly using the make.exe from the MinGW toolchain instead of make.exe from the i586-poky-linux toolchain.

[christoph.p]

Sorry I’m a little bit overwhelmed. Which paramters in the Config of the makefile do I have to change and how?</span></span>

• This reply was modified 7 years, 8 months ago by christoph.p.

[support]

Please start with trying this Makefile literally:

test:
<TAB>gcc -DTIMESTAMP=$(shell C:/mingw/msys/1.0/bin/date.exe +%s) -E test.c -o test.E

If it works, with your make.exe, please compare the syntax in it with your Makefile that is broken. If it does not, please download a clean MinGW toolchain from here and try using make.exe and mingw-make.exe from it.

[christoph.p]

I have created a bat file in windows with the following command:

C:\Intel\iotdk-ide-win\devkit-x86\sysroots\x86_64-pokysdk-mingw32\usr\libexec\i586-poky-linux\gcc\i586-poky-linux\4.9.1\gcc.exe -DTIMESTAMP=$(shell C:/mingw/msys/1.0/bin/date.exe +%s) -E helloworld.c -o test.E

This gives me also the error:

>C:\Intel\iotdk-ide-win\devkit-x86\sysroots\x86_64-pokysdk-mingw32\usr\libexec\i586-poky-linux\gcc\i586-poky-linux\4.9.1\gcc.exe -DTIMESTAMP=$(shell C:/mingw/msys/1.0/bin/date.exe +s) -E helloworld.c -o test.E
gcc.exe: error: +s): No such file or directory

I think something with the part “$(shell C:/mingw/msys/1.0/bin/date.exe +s)” doesn’t work in Windows.

Any hints?

[support]

Hi,

The “$(shell)” expansion is specific to GNU Make. I.e. if you just put it into a .bat file, Windows won’t expand it, however if you put it into a Makefile as shown in the previous post and run make.exe from your toolchain, it should get substituted properly.

[Author]

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