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doc: update build instructions for OS X #6309

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doc: update build instructions for OS X #6309

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21 changes: 15 additions & 6 deletions BUILDING.md
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Original file line number Diff line number Diff line change
Expand Up @@ -9,16 +9,25 @@ If you consistently can reproduce a test failure, search for it in the
file a new issue.


### Unix / Macintosh
### Unix / OS X

Prerequisites:

* `gcc` and `g++` 4.8 or newer, or
* `clang` and `clang++` 3.4 or newer
* Python 2.6 or 2.7
* GNU Make 3.81 or newer

On OS X, you will also need:
* [Xcode](https://developer.apple.com/xcode/download/)
* You also need to install the `Command Line Tools` via Xcode. You can find
this under the menu `Xcode -> Preferences -> Downloads`
* This step will install `gcc` and the related toolchain containing `make`

On FreeBSD and OpenBSD, you may also need:
* libexecinfo (FreeBSD and OpenBSD only)


```text
$ ./configure
$ make
Expand Down Expand Up @@ -118,7 +127,7 @@ This option will build with "small" (English only) support, but
the full `Intl` (ECMA-402) APIs. With `--download=all` it will
download the ICU library as needed.

##### Unix / Macintosh:
##### Unix / OS X:

```text
$ ./configure --with-intl=small-icu --download=all
Expand All @@ -141,7 +150,7 @@ data at runtime.
With the `--download=all`, this may download ICU if you don't have an
ICU in `deps/icu`.

##### Unix / Macintosh:
##### Unix / OS X:

```text
$ ./configure --with-intl=full-icu --download=all
Expand All @@ -158,7 +167,7 @@ $ ./configure --with-intl=full-icu --download=all
The `Intl` object will not be available. This is the default at
present, so this option is not normally needed.

##### Unix / Macintosh:
##### Unix / OS X:

```text
$ ./configure --with-intl=none
Expand All @@ -170,7 +179,7 @@ $ ./configure --with-intl=none
> vcbuild intl-none
```

#### Use existing installed ICU (Unix / Macintosh only):
#### Use existing installed ICU (Unix / OS X only):

```text
$ pkg-config --modversion icu-i18n && ./configure --with-intl=system-icu
Expand All @@ -186,7 +195,7 @@ You can find other ICU releases at
Download the file named something like `icu4c-**##.#**-src.tgz` (or
`.zip`).

##### Unix / Macintosh
##### Unix / OS X

```text
# from an already-unpacked ICU:
Expand Down