Unknown directive when building OpenSSL MIPS

[yan12125]

Description

When building OpenSSL MIPS with Clang, compiling a MIPS file leads to "unknown directive"

/opt/android-ndk-beta/toolchains/llvm/prebuilt/linux-x86_64/bin/clang  -I. -Icrypto/include -Iinclude -Icrypto -DDSO_DLFCN -DHAVE_DLFCN_H -DNDEBUG -DOPENSSL_THREADS -DOPENSSL_NO_STATIC_ENGINE -DOPENSSL_PIC -DOPENSSL_BN_ASM_MONT -DSHA1_ASM -DSHA256_ASM -DAES_ASM -DOPENSSLDIR="\"/usr/local/ssl\"" -DENGINESDIR="\"/usr/local/lib/engines-1.1\"" -Wall -O3 -pthread -fPIC --sysroot=/opt/android-ndk-beta/platforms/android-21/arch-mips -Wa,--noexecstack -gcc-toolchain /opt/android-ndk-beta/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64 -target mipsel-none-linux-android  -fPIC -DOPENSSL_USE_NODELETE -MMD -MF crypto/aes/aes-mips.d.tmp -MT crypto/aes/aes-mips.o -c -o crypto/aes/aes-mips.o crypto/aes/aes-mips.s
clang: warning: argument unused during compilation: '-D DSO_DLFCN'
clang: warning: argument unused during compilation: '-D HAVE_DLFCN_H'
clang: warning: argument unused during compilation: '-D NDEBUG'
clang: warning: argument unused during compilation: '-D OPENSSL_THREADS'
clang: warning: argument unused during compilation: '-D OPENSSL_NO_STATIC_ENGINE'
clang: warning: argument unused during compilation: '-D OPENSSL_PIC'
clang: warning: argument unused during compilation: '-D OPENSSL_BN_ASM_MONT'
clang: warning: argument unused during compilation: '-D SHA1_ASM'
clang: warning: argument unused during compilation: '-D SHA256_ASM'
clang: warning: argument unused during compilation: '-D AES_ASM'
clang: warning: argument unused during compilation: '-D OPENSSLDIR="/usr/local/ssl"'
clang: warning: argument unused during compilation: '-D ENGINESDIR="/usr/local/lib/engines-1.1"'
clang: warning: argument unused during compilation: '-pthread'
clang: warning: argument unused during compilation: '-D OPENSSL_USE_NODELETE'
clang: warning: argument unused during compilation: '-MMD'
clang: warning: argument unused during compilation: '-MF crypto/aes/aes-mips.d.tmp'
clang: warning: argument unused during compilation: '-MT crypto/aes/aes-mips.o'
crypto/aes/aes-mips.s:1058:1: error: unknown directive
.rdata
^

aes-mips.s is a generated source. See https://gist.github.com/yan12125/ea5bf41fdf504cdd212de3fff51a24ed

Steps to reproduce:
First save this patch as use-integrated-as-in-mips.patch

diff --git a/Configurations/20-android.conf b/Configurations/20-android.conf
index b89e51e63..89d994bd3 100644
--- a/Configurations/20-android.conf
+++ b/Configurations/20-android.conf
@@ -144,7 +144,7 @@
     },
     "android-mips-clang" => {
         inherit_from     => [ "android-clang", "android-mips-base" ],
-        cflags           => add(picker(default => "-target mipsel-none-linux-android -fno-integrated-as")),
+        cflags           => add(picker(default => "-target mipsel-none-linux-android")),
     },
     "android64-clang" => {
         inherit_from     => [ "android64-base" ],

git clone https://github.com/openssl/openssl
cd openssl
wget https://github.com/openssl/openssl/pull/2229.patch
patch -p1 -i 2229.patch
patch -p1 -i use-integrated-as-in-mips.patch
export CC="$ANDROID_NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/clang"
export CXX="$ANDROID_NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++"
export GCC_TOOLCHAIN="$ANDROID_NDK/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64"
export CROSS_SYSROOT="$ANDROID_NDK/platforms/android-21/arch-mips"

./Configure android-mips-clang
make

Environment Details

Not all of these will be relevant to every bug, but please provide as much
information as you can.

• NDK Version: 14.0.3529234-beta1
• Build sytem: custom
• Host OS: Arch Linux latest
• Compiler: Clang
• ABI: x86
• STL: N/A
• NDK API level: 21
• Device API level: N/A

[fornwall]

Is this fixed by the updated clang in r15 beta2?

[yan12125]

@fornwall: Clang's integrated assembler is still incompatible with OpenSSL git-master on MIPS. I didn't check stable releases.

[DanAlbert]

That's fine though, just use -fno-integrated-as for that target (and an explicit -fintegrated-as for mips64).

[DanAlbert]

MIPS is deprecated as of r16.