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fix example's mistake in slow-compiles.md 

the example lack the generation of factorial.o file which lead to an undefined reference error.
This commit is contained in:
Wu Yuanshou 2019-04-24 11:42:29 +08:00 committed by Martin Hořeňovský
parent 7c37501b07
commit 182fc3e46e
1 changed files with 3 additions and 2 deletions
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docs/slow-compiles.md
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@ -51,14 +51,15 @@ After compiling `tests-main.cpp` once, it is enough to link it with separately c
```
$ g++ tests-main.cpp -c
$ g++ tests-main.o tests-factorial.cpp -o tests && ./tests -r compact
$ g++ factorial.cpp -c
$ g++ tests-main.o factorial.o tests-factorial.cpp -o tests && ./tests -r compact
Passed 1 test case with 4 assertions.
```
Now, the next time we change the file `tests-factorial.cpp` (say we add `REQUIRE( Factorial(0) == 1)`), it is enough to recompile the tests instead of recompiling main as well:
```
$ g++ tests-main.o tests-factorial.cpp -o tests && ./tests -r compact
$ g++ tests-main.o factorial.o tests-factorial.cpp -o tests && ./tests -r compact
tests-factorial.cpp:11: failed: Factorial(0) == 1 for: 0 == 1
Failed 1 test case, failed 1 assertion.
```