CI: use a recent nightly

- add #[no_mangle] to the panic_fmt lang item to adjust to changes in
the visibility algorithm

- adjust to changes in the layout of Cargo's target directory

- use a newer Xargo to reduce the build time of the sysroot (only core
is compiled as part of the sysroot now)

.travis.yml

@@ -1,8 +1,7 @@
 cache: cargo
 dist: trusty
 language: rust
-# NOTE(nightly-2016-12-05) work around for rust-lang/rust#38281
+rust: nightly
-rust: nightly-2016-12-05
 services: docker
 sudo: required
 

ci/docker/thumbv6m-none-eabi/Dockerfile

@@ -3,7 +3,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
     ca-certificates curl gcc gcc-arm-none-eabi libc6-dev libcurl4-openssl-dev libssh2-1 libnewlib-dev
 RUN curl -LSfs https://japaric.github.io/trust/install.sh | \
-    sh -s -- --git japaric/xargo --tag v0.2.1 --target x86_64-unknown-linux-gnu --to /usr/bin
+    sh -s -- --git japaric/xargo --tag v0.3.1 --target x86_64-unknown-linux-gnu --to /usr/bin
 ENV AR_thumbv6m_none_eabi=arm-none-eabi-ar \
     CARGO_TARGET_THUMBV6M_NONE_EABI_LINKER=arm-none-eabi-gcc \
     CC_thumbv6m_none_eabi=arm-none-eabi-gcc \

ci/docker/thumbv7em-none-eabi/Dockerfile

@@ -3,7 +3,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
     ca-certificates curl gcc gcc-arm-none-eabi libc6-dev libcurl4-openssl-dev libssh2-1 libnewlib-dev
 RUN curl -LSfs https://japaric.github.io/trust/install.sh | \
-    sh -s -- --git japaric/xargo --tag v0.2.1 --target x86_64-unknown-linux-gnu --to /usr/bin
+    sh -s -- --git japaric/xargo --tag v0.3.1 --target x86_64-unknown-linux-gnu --to /usr/bin
 ENV AR_thumbv7em_none_eabi=arm-none-eabi-ar \
     CARGO_TARGET_THUMBV7EM_NONE_EABI_LINKER=arm-none-eabi-gcc \
     CC_thumbv7em_none_eabi=arm-none-eabi-gcc \

ci/docker/thumbv7em-none-eabihf/Dockerfile

@@ -3,7 +3,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
     ca-certificates curl gcc gcc-arm-none-eabi libc6-dev libcurl4-openssl-dev libssh2-1 libnewlib-dev
 RUN curl -LSfs https://japaric.github.io/trust/install.sh | \
-    sh -s -- --git japaric/xargo --tag v0.2.1 --target x86_64-unknown-linux-gnu --to /usr/bin
+    sh -s -- --git japaric/xargo --tag v0.3.1 --target x86_64-unknown-linux-gnu --to /usr/bin
 ENV AR_thumbv7em_none_eabihf=arm-none-eabi-ar \
     CARGO_TARGET_THUMBV7EM_NONE_EABIHF_LINKER=arm-none-eabi-gcc \
     CC_thumbv7em_none_eabihf=arm-none-eabi-gcc \

ci/docker/thumbv7m-none-eabi/Dockerfile

@@ -3,7 +3,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
     ca-certificates curl gcc gcc-arm-none-eabi libc6-dev libcurl4-openssl-dev libssh2-1 libnewlib-dev
 RUN curl -LSfs https://japaric.github.io/trust/install.sh | \
-    sh -s -- --git japaric/xargo --tag v0.2.1 --target x86_64-unknown-linux-gnu --to /usr/bin
+    sh -s -- --git japaric/xargo --tag v0.3.1 --target x86_64-unknown-linux-gnu --to /usr/bin
 ENV AR_thumbv7m_none_eabi=arm-none-eabi-ar \
     CARGO_TARGET_THUMBV7M_NONE_EABI_LINKER=arm-none-eabi-gcc \
     CC_thumbv7m_none_eabi=arm-none-eabi-gcc \

ci/run.sh

@@ -26,7 +26,7 @@ esac
 # TODO(#79) fix the undefined references problem for debug-assertions+lto
 case $1 in
     thumb*)
-        RUSTFLAGS="-C debug-assertions=no -C link-arg=-nostartfiles" xargo rustc --no-default-features --features c --target $1 --bin intrinsics -- -C lto
+        RUSTFLAGS="-C debug-assertions=no" xargo rustc --no-default-features --features c --target $1 --bin intrinsics -- -C lto -C link-arg=-nostartfiles
         xargo rustc --no-default-features --features c --target $1 --bin intrinsics --release -- -C lto
         ;;
     *)
@@ -61,18 +61,22 @@ case $TRAVIS_OS_NAME in
         ;;
 esac
 
-# NOTE On i586, It's normal that the get_pc_thunk symbol appears several times so ignore it
 if [ $TRAVIS_OS_NAME = osx ]; then
-    path=target/${1}/debug/libcompiler_builtins.rlib
+    path=target/${1}/debug/deps/libcompiler_builtins-*.rlib
 else
-    path=/target/${1}/debug/libcompiler_builtins.rlib
+    path=/target/${1}/debug/deps/libcompiler_builtins-*.rlib
 fi
 
-stdout=$($PREFIX$NM -g --defined-only $path)
+for rlib in $(echo $path); do
+    stdout=$($PREFIX$NM -g --defined-only $rlib)
 
-set +e
+    # NOTE On i586, It's normal that the get_pc_thunk symbol appears several times so ignore it
-echo "$stdout" | sort | uniq -d | grep -v __x86.get_pc_thunk | grep 'T __'
+    set +e
+    echo "$stdout" | sort | uniq -d | grep -v __x86.get_pc_thunk | grep 'T __'
 
-if test $? = 0; then
+    if test $? = 0; then
         exit 1
-fi
+    fi
+done
+
+true

src/bin/intrinsics.rs

@@ -403,5 +403,6 @@ pub fn _Unwind_Resume() {}
 extern "C" fn eh_personality() {}
 
 #[cfg(not(test))]
+#[no_mangle]
 #[lang = "panic_fmt"]
 extern "C" fn panic_fmt() {}