From 396df7efdf26a60084d2dbc2082be5dbdd7370d0 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Anders=20Bj=C3=B6rklund?= <anders@itension.se>
Date: Mon, 1 Feb 2016 22:48:05 +0100
Subject: [PATCH] Fix clang test suite when running on linux (elf)

Need to use eu-elfcmp (from elfutils) instead of cmp, to compare
objects. Also need to cater for color coding (not to /dev/null).
And it seems like the pch test suite hadn't been kept up to date
plus some minor annoyances (i.e. a warning) in the coverage test.
---
 .travis.yml |   6 +--
 test.sh     | 146 ++++++++++++++++++++++++++++++++++------------------
 2 files changed, 98 insertions(+), 54 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 339726292..ed62987e3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ addons:
     apt:
         packages:
             - zlib1g-dev
+            - elfutils
 
 os:
     - linux
@@ -26,7 +27,4 @@ script:
     - ./autogen.sh
     - ./configure
     - make
-    - make quicktest
-    - if [ "$CC" = "gcc" ]; then
-          ./test.sh;
-      fi
+    - make test
diff --git a/test.sh b/test.sh
index c2ae3cc5b..fea8c022d 100755
--- a/test.sh
+++ b/test.sh
@@ -96,6 +96,17 @@ compare_file() {
     fi
 }
 
+compare_object() {
+    if [ $HOST_OS_LINUX -eq 1 ] && [ $COMPILER_TYPE_CLANG -eq 1 ]; then
+        eu-elfcmp -q "$1" "$2"
+    else
+        cmp -s "$1" "$2"
+    fi
+    if [ $? -ne 0 ]; then
+        test_failed "Objects differ: $1 != $2"
+    fi
+}
+
 checkfile() {
     if [ ! -f $1 ]; then
         test_failed "$1 not found"
@@ -163,14 +174,14 @@ base_tests() {
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkstat 'files in cache' 1
-    compare_file reference_test1.o test1.o
+    compare_object reference_test1.o test1.o
 
     testname="BASIC2"
     $CCACHE_COMPILE -c test1.c
     checkstat 'cache hit (preprocessed)' 1
     checkstat 'cache miss' 1
     checkstat 'files in cache' 1
-    compare_file reference_test1.o test1.o
+    compare_object reference_test1.o test1.o
 
     testname="debug"
     $CCACHE_COMPILE -c test1.c -g
@@ -187,7 +198,7 @@ base_tests() {
     $CCACHE_COMPILE -c test1.c -o foo.o
     checkstat 'cache hit (preprocessed)' 3
     checkstat 'cache miss' 2
-    compare_file reference_test1.o foo.o
+    compare_object reference_test1.o foo.o
 
     testname="link"
     $CCACHE_COMPILE test1.c -o test 2> /dev/null
@@ -255,12 +266,12 @@ base_tests() {
     checkstat 'cache hit (preprocessed)' 4
     checkstat 'cache miss' 3
     CCACHE_DISABLE=1 $COMPILER -c test1.c -o reference_test1.o -O -O
-    compare_file reference_test1.o test1.o
+    compare_object reference_test1.o test1.o
 
     CCACHE_CPP2=1 $CCACHE_COMPILE -c test1.c -O -O
     checkstat 'cache hit (preprocessed)' 5
     checkstat 'cache miss' 3
-    compare_file reference_test1.o test1.o
+    compare_object reference_test1.o test1.o
 
     testname="CCACHE_NOSTATS"
     CCACHE_NOSTATS=1 $CCACHE_COMPILE -c test1.c -O -O
@@ -271,7 +282,7 @@ base_tests() {
     CCACHE_RECACHE=1 $CCACHE_COMPILE -c test1.c -O -O
     checkstat 'cache hit (preprocessed)' 5
     checkstat 'cache miss' 4
-    compare_file reference_test1.o test1.o
+    compare_object reference_test1.o test1.o
 
     # strictly speaking should be 4 - RECACHE causes a double counting!
     checkstat 'files in cache' 4
@@ -282,13 +293,13 @@ base_tests() {
     CCACHE_HASHDIR=1 $CCACHE_COMPILE -c test1.c -O -O
     checkstat 'cache hit (preprocessed)' 5
     checkstat 'cache miss' 5
-    compare_file reference_test1.o test1.o
+    compare_object reference_test1.o test1.o
 
     CCACHE_HASHDIR=1 $CCACHE_COMPILE -c test1.c -O -O
     checkstat 'cache hit (preprocessed)' 6
     checkstat 'cache miss' 5
     checkstat 'files in cache' 5
-    compare_file reference_test1.o test1.o
+    compare_object reference_test1.o test1.o
 
     testname="comments"
     echo '/* a silly comment */' > test1-comment.c
@@ -310,7 +321,7 @@ base_tests() {
     checkstat 'cache hit (preprocessed)' 7
     checkstat 'cache miss' 7
     CCACHE_DISABLE=1 $COMPILER -c test1.c -o reference_test1.o
-    compare_file reference_test1.o test1.o
+    compare_object reference_test1.o test1.o
 
     testname="cache-size"
     for f in *.c; do
@@ -365,7 +376,7 @@ base_tests() {
     checkstat 'unsupported source language' 2
 
     testname="-D not hashed"
-    $CCACHE_COMPILE -DNOT_AFFECTING=1 -c test1.c 2>/dev/null
+    $CCACHE_COMPILE -DNOT_AFFECTING=1 -c test1.c
     checkstat 'cache hit (preprocessed)' 14
     checkstat 'cache miss' 39
 
@@ -531,6 +542,8 @@ EOF
     cat <<'EOF' >prefix-remove.sh
 #!/bin/sh
 "$@"
+[ x$2 = x-fcolor-diagnostics ] && shift
+[ x$2 = x-fdiagnostics-color ] && shift
 [ x$3 = x-o ] && rm $4
 EOF
     chmod +x prefix-remove.sh
@@ -544,6 +557,8 @@ EOF
     cat <<'EOF' >prefix-empty.sh
 #!/bin/sh
 "$@"
+[ x$2 = x-fcolor-diagnostics ] && shift
+[ x$2 = x-fdiagnostics-color ] && shift
 [ x$3 = x-o ] && cp /dev/null $4
 EOF
     chmod +x prefix-empty.sh
@@ -586,9 +601,14 @@ EOF
     if [ $HOST_OS_APPLE -eq 1 ] && [ $COMPILER_USES_LLVM -eq 1 ]; then
         darwin_llvm=1
     fi
+    # ditto clang on linux
+    linux_clang=0
+    if [ $HOST_OS_LINUX -eq 1 ] && [ $COMPILER_TYPE_CLANG -eq 1 ]; then
+        linux_clang=1
+    fi
 
     $COMPILER -c -fprofile-generate test1.c 2>/dev/null
-    if [ $? -eq 0 ] && [ $darwin_llvm -eq 0 ]; then
+    if [ $? -eq 0 ] && [ $darwin_llvm -eq 0 ] && [ $linux_clang -eq 0 ]; then
         testname="profile-generate"
         $CCACHE -Cz > /dev/null
         $CCACHE_COMPILE -c -fprofile-generate test1.c
@@ -766,7 +786,7 @@ int test3;
 EOF
     cat <<EOF >code.c
 /* code.c */
-int test() {}
+int test() { return 0; }
 EOF
     backdate test1.h test2.h test3.h
 
@@ -893,7 +913,7 @@ EOF
     checkstat 'cache miss' 1
     checkfile other.d "$expected_d_content"
     CCACHE_DISABLE=1 $COMPILER -c -Wp,-MD,other.d test.c -o reference_test.o
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f other.d
 
@@ -902,7 +922,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkfile other.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f other.d
 
@@ -911,7 +931,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkfile different_name.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f different_name.d
 
@@ -926,7 +946,7 @@ EOF
     checkstat 'cache miss' 1
     checkfile other.d "$expected_mmd_d_content"
     CCACHE_DISABLE=1 $COMPILER -c -Wp,-MMD,other.d test.c -o reference_test.o
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f other.d
 
@@ -935,7 +955,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkfile other.d "$expected_mmd_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f other.d
 
@@ -944,7 +964,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkfile different_name.d "$expected_mmd_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f different_name.d
 
@@ -972,7 +992,7 @@ EOF
     checkstat 'cache miss' 1
     checkfile test.d "$expected_d_content"
     CCACHE_DISABLE=1 $COMPILER -c -MD test.c -o reference_test.o
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f test.d
 
@@ -981,7 +1001,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkfile test.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     ##################################################################
     # Check that coverage works.
@@ -1024,7 +1044,7 @@ EOF
     checkstat 'cache miss' 1
     checkfile test.d "$expected_d_content"
     CCACHE_DISABLE=1 $COMPILER -c -MD test.c -o reference_test.o
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f test.d
 
@@ -1033,7 +1053,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 1
     checkstat 'cache miss' 1
     checkfile test.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f test.d
 
@@ -1042,7 +1062,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 2
     checkstat 'cache miss' 1
     checkfile test.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f test.d
 
@@ -1051,7 +1071,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 2
     checkstat 'cache miss' 1
     checkfile test.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     ##################################################################
     # Check that -MF works.
@@ -1064,7 +1084,7 @@ EOF
     checkstat 'cache miss' 1
     checkfile other.d "$expected_d_content"
     CCACHE_DISABLE=1 $COMPILER -c -MD -MF other.d test.c -o reference_test.o
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f other.d
 
@@ -1073,14 +1093,14 @@ EOF
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkfile other.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     $CCACHE $COMPILER -c -MD -MF different_name.d test.c
     checkstat 'cache hit (direct)' 2
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkfile different_name.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f different_name.d
 
@@ -1089,7 +1109,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkfile third_name.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     rm -f third_name.d
 
@@ -1105,14 +1125,14 @@ EOF
     checkstat 'cache miss' 1
     checkfile other.d "$expected_d_content"
     CCACHE_DISABLE=1 $COMPILER -c -MD test.c -o reference_test.o
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     $CCACHE $COMPILER -c -MD test.c
     checkstat 'cache hit (direct)' 1
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     checkfile other.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     find $CCACHE_DIR -name '*.d' -exec rm -f '{}' \;
 
@@ -1121,7 +1141,7 @@ EOF
     checkstat 'cache hit (preprocessed)' 1
     checkstat 'cache miss' 1
     checkfile other.d "$expected_d_content"
-    compare_file reference_test.o test.o
+    compare_object reference_test.o test.o
 
     ##################################################################
     # Check that stderr from both the preprocessor and the compiler is emitted
@@ -1691,7 +1711,7 @@ readonly_suite() {
     echo "int test2;" >test2.c
 
     # Cache a compilation.
-    $CCACHE $COMPILER -c test.c -o test.o
+    $CCACHE $COMPILER -c test.c -o test.o 2>/dev/null
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
 
@@ -2224,7 +2244,7 @@ gcc_pch_suite() {
 
 clang_pch_suite() {
     ##################################################################
-    # Tests for creating a .gch.
+    # Tests for creating a .gch without opt-in.
 
     backdate pch.h
 
@@ -2233,9 +2253,30 @@ clang_pch_suite() {
     $CCACHE $COMPILER $SYSROOT -c pch.h
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 0
+    checkstat 'cache miss' 0
+    checkstat "can't use precompiled header" 1
+
+    testname="create .gch, no -c, -o, without opt-in"
+    $CCACHE -Cz >/dev/null
+    $CCACHE $COMPILER pch.h -o pch.gch
+    checkstat 'cache hit (direct)' 0
+    checkstat 'cache hit (preprocessed)' 0
+    checkstat 'cache miss' 0
+    checkstat "can't use precompiled header" 1
+
+    ##################################################################
+    # Tests for creating a .gch with opt-in.
+
+    backdate pch.h
+
+    testname="create .gch, -c, no -o, with opt-in"
+    $CCACHE -zC >/dev/null
+    CCACHE_SLOPPINESS=pch_defines,time_macros $CCACHE $COMPILER $SYSROOT -c pch.h
+    checkstat 'cache hit (direct)' 0
+    checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     rm -f pch.h.gch
-    $CCACHE $COMPILER $SYSROOT -c pch.h
+    CCACHE_SLOPPINESS=pch_defines,time_macros $CCACHE $COMPILER $SYSROOT -c pch.h
     checkstat 'cache hit (direct)' 1
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
@@ -2243,13 +2284,13 @@ clang_pch_suite() {
         test_failed "pch.h.gch missing"
     fi
 
-    testname="create .gch, no -c, -o"
+    testname="create .gch, no -c, -o, with opt-in"
     $CCACHE -Cz >/dev/null
-    $CCACHE $COMPILER $SYSROOT pch.h -o pch.gch
+    CCACHE_SLOPPINESS=pch_defines,time_macros $CCACHE $COMPILER $SYSROOT pch.h -o pch.gch
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
-    $CCACHE $COMPILER $SYSROOT pch.h -o pch.gch
+    CCACHE_SLOPPINESS=pch_defines,time_macros $CCACHE $COMPILER $SYSROOT pch.h -o pch.gch
     checkstat 'cache hit (direct)' 1
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
@@ -2274,11 +2315,11 @@ clang_pch_suite() {
 
     testname="gch, no -fpch-preprocess, -include, sloppy time macros"
     $CCACHE -Cz >/dev/null
-    CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h pch2.c 2>/dev/null
+    CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h pch2.c 2>/dev/null
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
-    CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h pch2.c 2>/dev/null
+    CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h pch2.c 2>/dev/null
     checkstat 'cache hit (direct)' 1
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
@@ -2293,11 +2334,11 @@ clang_pch_suite() {
 
     testname="gch, preprocessor mode"
     $CCACHE -Cz >/dev/null
-    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
+    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
-    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
+    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 1
     checkstat 'cache miss' 1
@@ -2305,11 +2346,11 @@ clang_pch_suite() {
     testname="gch, preprocessor mode, file changed"
     echo "updated" >>pch.h.gch # clang seems to cope with this...
     backdate pch.h.gch
-    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
+    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 1
     checkstat 'cache miss' 2
-    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
+    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 2
     checkstat 'cache miss' 2
@@ -2323,12 +2364,12 @@ clang_pch_suite() {
 
     testname="create .pth, -c, -o"
     $CCACHE -zC >/dev/null
-    $CCACHE $COMPILER $SYSROOT -c pch.h -o pch.h.pth
+    CCACHE_SLOPPINESS=pch_defines,time_macros $CCACHE $COMPILER $SYSROOT -c pch.h -o pch.h.pth
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
     rm -f pch.h.pth
-    $CCACHE $COMPILER $SYSROOT -c pch.h -o pch.h.pth
+    CCACHE_SLOPPINESS=pch_defines,time_macros $CCACHE $COMPILER $SYSROOT -c pch.h -o pch.h.pth
     checkstat 'cache hit (direct)' 1
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
@@ -2352,11 +2393,11 @@ clang_pch_suite() {
 
     testname="pth, no -fpch-preprocess, -include, sloppy time macros"
     $CCACHE -Cz >/dev/null
-    CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h pch2.c 2>/dev/null
+    CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h pch2.c 2>/dev/null
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
-    CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h pch2.c 2>/dev/null
+    CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h pch2.c 2>/dev/null
     checkstat 'cache hit (direct)' 1
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 1
@@ -2364,7 +2405,7 @@ clang_pch_suite() {
     testname="pth, -fpch-preprocess, -include, file changed"
     echo "updated" >>pch.h.pth # clang seems to cope with this...
     backdate pch.h.pth
-    CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
+    CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
     checkstat 'cache hit (direct)' 1
     checkstat 'cache hit (preprocessed)' 0
     checkstat 'cache miss' 2
@@ -2383,11 +2424,11 @@ clang_pch_suite() {
     testname="pth, preprocessor mode, file changed"
     echo "updated" >>pch.h.pth # clang seems to cope with this...
     backdate pch.h.pth
-    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
+    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 1
     checkstat 'cache miss' 2
-    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS=time_macros $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
+    CCACHE_NODIRECT=1 CCACHE_SLOPPINESS="$default_sloppiness pch_defines time_macros" $CCACHE $COMPILER $SYSROOT -c -include pch.h -fpch-preprocess pch.c
     checkstat 'cache hit (direct)' 0
     checkstat 'cache hit (preprocessed)' 2
     checkstat 'cache miss' 2
@@ -2470,7 +2511,9 @@ COMPILER_TYPE_CLANG=0
 COMPILER_TYPE_GCC=0
 
 COMPILER_USES_LLVM=0
+
 HOST_OS_APPLE=0
+HOST_OS_LINUX=0
 
 compiler_version="`$COMPILER --version 2>&1 | head -1`"
 case $compiler_version in
@@ -2497,6 +2540,9 @@ case $host_os in
     *Darwin*)
         HOST_OS_APPLE=1
         ;;
+    *Linux*)
+        HOST_OS_LINUX=1
+        ;;
 esac
 
 TESTDIR=testdir.$$
-- 
2.47.2