Can't compile plcrashreporter in Xcode 4 - ios

Question

I can use the prebuilt framework provided on the plcrashreporter project page when compiling for the device, but not for the simulator. I have the same problem described here.
I assume the prebuilt framework does not support the simulator's architecture, so I downloaded out the plcrashreporter source. I opened the Xcode project and selected the CrashReporter-iOS-Simulator > iPhone 4.3 Simulator target. When I try to build the project, I get this error:
libtool: unknown option character `D' in: -D__IPHONE_OS_VERSION_MIN_REQUIRED=30000
I get the same error when I try to build most of the other targets (such as for device).
My next step was to try adding the source files to my project. I no longer have the aforementioned problem; however, I get this error when I try to compile:
fatal error: 'crash_report.pb-c.h' file not found [2]
#import "crash_report.pb-c.h"
^
1 error generated.
Command clang failed with exit code 1
The crash_report.pb-c.h file which is mentioned in the error message simply does not exist; I've searched the plcrashreporter source tree and the internet. Therefore, I have to assume that this file is supposed to be generated somehow, but I cannot figure out how.
(Commenting out the line in PLCrashReport.m on which crash_report.pb-c.h is included results in numerous other compilation errors.)

Answer 1

You are correct in that the file does not exist normally, nor does crash_report.pb-c.c exist, which will be your next error after this one.
The crash_report.pb.h and crash_report.pb.c files are generated at compile time through a build rule. You need to add a custom script to your build process to make them.
First, make sure you have protoc-c in the plcrashreporter folder of your project (plcrashreporter-1.0/Dependencies/protobuf-2.0.3/bin/protoc-c). They buried it deep. This is what your script will be running.
Then find your crash_report.proto file. This is the main input that protoc-c will be using to create your missing files. You can take this directory and put it manually into your script, OR you can make a rule to run the script on every *.proto file. I do the latter.
Then edit your build rules to include a script that runs protoc-c with the flag --c_out="${DERIVED_FILES_DIR}" and your crash_report.proto file as two inputs, this will output crash_report.pb-c.h and crash_report.pb-c.c into the same directory as where your crash_report.proto file is, which should already be accessible in your project.
The build rules in Xcode 4 (and above) are under your project's target's build rules tab. You add a build rule before all your other build rules. Here's what mine looks like in Xcode:
You'll probably have to fiddle with the directory