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authorAndy Lutomirski <luto@kernel.org>2015-05-12 01:11:36 +0300
committerShuah Khan <shuahkh@osg.samsung.com>2015-05-13 05:02:40 +0300
commite9886ace222eb48bb57bd541320056ca334bd3a0 (patch)
tree11c057e7a46cff720383c099edbee96eec4b60e6 /tools
parentc1e6e5cb941b54c2e7e84d9a796c1ad8377f44da (diff)
downloadlinux-e9886ace222eb48bb57bd541320056ca334bd3a0.tar.xz
selftests, x86: Rework x86 target architecture detection
We currently fail to build on a non-multilib x86_64 target. We print a helpful error, but it's nicer to allow the build to succeed. Fix it and improve cross-compilation support by detecting architecture support directly and building only the relevant tests. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/x86/Makefile55
-rwxr-xr-xtools/testing/selftests/x86/check_cc.sh16
-rw-r--r--tools/testing/selftests/x86/trivial_32bit_program.c4
-rw-r--r--tools/testing/selftests/x86/trivial_64bit_program.c18
4 files changed, 67 insertions, 26 deletions
diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile
index fe635399a3a6..5bdb781163d1 100644
--- a/tools/testing/selftests/x86/Makefile
+++ b/tools/testing/selftests/x86/Makefile
@@ -1,4 +1,8 @@
-.PHONY: all all_32 all_64 check_build32 clean
+all:
+
+include ../lib.mk
+
+.PHONY: all all_32 all_64 warn_32bit_failure clean
TARGETS_C_BOTHBITS := sigreturn single_step_syscall
@@ -7,29 +11,24 @@ BINARIES_64 := $(TARGETS_C_BOTHBITS:%=%_64)
CFLAGS := -O2 -g -std=gnu99 -pthread -Wall
-all:
-
UNAME_M := $(shell uname -m)
+CAN_BUILD_I386 := $(shell ./check_cc.sh $(CC) trivial_32bit_program.c -m32)
+CAN_BUILD_X86_64 := $(shell ./check_cc.sh $(CC) trivial_64bit_program.c)
-ifeq ($(CROSS_COMPILE),)
-# Always build 32-bit tests
+ifeq ($(CAN_BUILD_I386),1)
all: all_32
-# Install 32-bit tests
TEST_PROGS += $(BINARIES_32)
-# If we're on a 64-bit host, build 64-bit tests as well
-ifeq ($(UNAME_M),x86_64)
+endif
+
+ifeq ($(CAN_BUILD_X86_64),1)
all: all_64
-# Install 64-bit tests
TEST_PROGS += $(BINARIES_64)
endif
-endif
-all_32: check_build32 $(BINARIES_32)
+all_32: $(BINARIES_32)
all_64: $(BINARIES_64)
-include ../lib.mk
-
clean:
$(RM) $(BINARIES_32) $(BINARIES_64)
@@ -39,16 +38,20 @@ $(TARGETS_C_BOTHBITS:%=%_32): %_32: %.c
$(TARGETS_C_BOTHBITS:%=%_64): %_64: %.c
$(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl
-check_build32:
- @if ! $(CC) -m32 -o /dev/null trivial_32bit_program.c; then \
- echo "Warning: you seem to have a broken 32-bit build" 2>&1; \
- echo "environment. If you are using a Debian-like"; \
- echo " distribution, try:"; \
- echo ""; \
- echo " apt-get install gcc-multilib libc6-i386 libc6-dev-i386"; \
- echo ""; \
- echo "If you are using a Fedora-like distribution, try:"; \
- echo ""; \
- echo " yum install glibc-devel.*i686"; \
- exit 1; \
- fi
+# x86_64 users should be encouraged to install 32-bit libraries
+ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),01)
+all: warn_32bit_failure
+
+warn_32bit_failure:
+ @echo "Warning: you seem to have a broken 32-bit build" 2>&1; \
+ echo "environment. This will reduce test coverage of 64-bit" 2>&1; \
+ echo "kernels. If you are using a Debian-like distribution," 2>&1; \
+ echo "try:"; 2>&1; \
+ echo ""; \
+ echo " apt-get install gcc-multilib libc6-i386 libc6-dev-i386"; \
+ echo ""; \
+ echo "If you are using a Fedora-like distribution, try:"; \
+ echo ""; \
+ echo " yum install glibc-devel.*i686"; \
+ exit 0;
+endif
diff --git a/tools/testing/selftests/x86/check_cc.sh b/tools/testing/selftests/x86/check_cc.sh
new file mode 100755
index 000000000000..172d3293fb7b
--- /dev/null
+++ b/tools/testing/selftests/x86/check_cc.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+# check_cc.sh - Helper to test userspace compilation support
+# Copyright (c) 2015 Andrew Lutomirski
+# GPL v2
+
+CC="$1"
+TESTPROG="$2"
+shift 2
+
+if "$CC" -o /dev/null "$TESTPROG" -O0 "$@" 2>/dev/null; then
+ echo 1
+else
+ echo 0
+fi
+
+exit 0
diff --git a/tools/testing/selftests/x86/trivial_32bit_program.c b/tools/testing/selftests/x86/trivial_32bit_program.c
index 2e231beb0a39..fabdf0f51621 100644
--- a/tools/testing/selftests/x86/trivial_32bit_program.c
+++ b/tools/testing/selftests/x86/trivial_32bit_program.c
@@ -4,6 +4,10 @@
* GPL v2
*/
+#ifndef __i386__
+# error wrong architecture
+#endif
+
#include <stdio.h>
int main()
diff --git a/tools/testing/selftests/x86/trivial_64bit_program.c b/tools/testing/selftests/x86/trivial_64bit_program.c
new file mode 100644
index 000000000000..b994946c40fb
--- /dev/null
+++ b/tools/testing/selftests/x86/trivial_64bit_program.c
@@ -0,0 +1,18 @@
+/*
+ * Trivial program to check that we have a valid 32-bit build environment.
+ * Copyright (c) 2015 Andy Lutomirski
+ * GPL v2
+ */
+
+#ifndef __x86_64__
+# error wrong architecture
+#endif
+
+#include <stdio.h>
+
+int main()
+{
+ printf("\n");
+
+ return 0;
+}