Dependent Origination

multiple definitions during linking

Posted on: January 30, 2013

Let’s say we have two libraries A and B. They both need library C, which is a header file only library since there are only two simple functions in the header file. Now I am building D, which needs both A and B. The linker is complaining multiple definitions of functions of C since both .o files have them.

Solution: make the functions in the header file (of C) inline. This way, it won’t be compiled as a separate function into the object files. Even if the compiler couldn’t make it inline, compiler will find an anonymous namespace and put the function there.

The other solution we can separate out a .cc file from the header that way we would have a third .o file and that solves everything too. But I find the inline solution better in this case, and it increases my knowledge about compiler too🙂

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

January 2013
M T W T F S S
« Dec   Feb »
 123456
78910111213
14151617181920
21222324252627
28293031  

Twitter

  • is emptying trash and happily discovering the available disk space now ranks at 100G+. 2 days ago
  • is looking at other people's intentions, not their capabilities, and feeling much happier every day :) 11 months ago
  • is planning on how to spend the next two weeks until the new year, at home. 11 months ago
  • is going to have human company for Thanksgiving; a rare event for the past like twenty years. 1 year ago
  • living by myself again; a strange feeling in a bustling city with thirteen million people 1 year ago

Flickr Photos

IMG_3517

IMG_3515

IMG_3505

IMG_3497

IMG_3261

IMG_3260

IMG_3255

IMG_2736

IMG_2733

IMG_2629

More Photos
%d bloggers like this: