Example issues on a mac about 21st-century-examples HOT 9 CLOSED

Realized this is more of an issue with the difference between GCC/clang on a mac

$ gcc --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 7.0.0 (clang-700.1.76)
Target: x86_64-apple-darwin14.5.0
Thread model: posix

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@b-k Have you had a chance to read this?
@schneems How did you fix this?

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@bucaran you don't need -Wall in this example.

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Great. Thanks @schneems

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Hi, sorry I missed your message.

Some Macs ship with a version of GCC that has been recompiled to default to certain standards and use different flags from the usual gcc. On the Mac I tested on that had this gcc alias, I set up a one-line script name gcc consisting of
clang $*
and put that in my PATH. There are other ways to get around Apple's specialized gcc. For the examples, you can remove -Wall, as @schneems noted, but that's probably a bad habit for day-to-day code writing.

Also, I'm told that a lot of macs don't yet have the at_quick_exit function as specified in the C11 standard, so that will have to be commented out to compile on those macs.

I hope that helps.

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I'm not able to get this working, same error as @schneems. I've tried the clang $* trick in a file named gcc in my root directory, and chmod +x it and put ~/ on my PATH, but I'm still getting error 64.

Is there something else that I'm missing? The code runs fine on Ubuntu, but that's not as convenient as using OSX on my Mac.

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So I got it working...at least for me, the minimal makefile is just the following, no need for alternate files/PATH solutions:

OBJECTS=
CFLAGS= -g -Wall -O3
LDLIBS=
CC=clang

$(P): $(OBJECTS)

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Great, thanks for posting this @randyzwitch

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Can confirm. That worked, thanks!

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