1.5 fails to build against upstream LLVM 3.7

[sylvestre]

Using Debian package 3.7

x86_64-unknown-linux-gnu/stage0/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_front-35c36e89.rlib
g++  -O2  -Wall -Werror -g -fPIC -m64 -fno-rtti -c -o  x86_64-unknown-linux-gnu/rustllvm/RustWrapper.o  -I//usr//lib//llvm-3.7//include  -DNDEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -g -O2 -fomit-frame-pointer -std=c++11 -fvisibility-inlines-hidden -fno-exceptions -fPIC -ffunction-sections -fdata-sections -Wcast-qual   -I /usr/lib/llvm-3.7/include -I /home/sylvestre/dev/debian/rustc.git/src/rustllvm/include /home/sylvestre/dev/debian/rustc.git/src/rustllvm/RustWrapper.cpp
/home/sylvestre/dev/debian/rustc.git/src/rustllvm/RustWrapper.cpp: In function ‘LLVMOpaqueValue* LLVMRustBuildLandingPad(LLVMBuilderRef, LLVMTypeRef, LLVMValueRef, unsigned int, const char*, LLVMValueRef)’:
/home/sylvestre/dev/debian/rustc.git/src/rustllvm/RustWrapper.cpp:972:69: error: invalid conversion from ‘LLVMValueRef {aka LLVMOpaqueValue*}’ to ‘unsigned int’ [-fpermissive]
     return LLVMBuildLandingPad(Builder, Ty, PersFn, NumClauses, Name);
                                                                     ^
/home/sylvestre/dev/debian/rustc.git/src/rustllvm/RustWrapper.cpp:972:69: error: invalid conversion from ‘unsigned int’ to ‘const char*’ [-fpermissive]
/home/sylvestre/dev/debian/rustc.git/src/rustllvm/RustWrapper.cpp:972:69: error: too many arguments to function ‘LLVMOpaqueValue* LLVMBuildLandingPad(LLVMBuilderRef, LLVMTypeRef, unsigned int, const char*)’
In file included from //usr//lib//llvm-3.7//include/llvm/IR/Value.h:17:0,
                 from //usr//lib//llvm-3.7//include/llvm/IR/User.h:24,
                 from //usr//lib//llvm-3.7//include/llvm/IR/Instruction.h:22,
                 from //usr//lib//llvm-3.7//include/llvm/IR/BasicBlock.h:19,
                 from //usr//lib//llvm-3.7//include/llvm/IR/IRBuilder.h:21,
                 from /home/sylvestre/dev/debian/rustc.git/src/rustllvm/rustllvm.h:11,
                 from /home/sylvestre/dev/debian/rustc.git/src/rustllvm/RustWrapper.cpp:11:
//usr//lib//llvm-3.7//include/llvm-c/Core.h:2677:14: note: declared here
 LLVMValueRef LLVMBuildLandingPad(LLVMBuilderRef B, LLVMTypeRef Ty,
              ^
/home/sylvestre/dev/debian/rustc.git/mk/rustllvm.mk:60: recipe for target 'x86_64-unknown-linux-gnu/rustllvm/RustWrapper.o' failed

Updating to 3.7.1 rc2 fixes the build. Having a version check in the configure would help.

[alexcrichton]

I believe this is a dupe of #29490, but thanks for the report!

[sylvestre]

pff, shame on me, i am cced on the dup and I even replied to it 👎