CI updates

.github/workflows/ci.yml

@@ -110,6 +110,8 @@ jobs:
         with: { submodules: true }
       - name: Check out test suite
         run: git clone --depth=1 https://github.com/upx/upx-testsuite ../deps/upx-testsuite
+      - run: set -x; clang --version; clang++ --version
+      - run: set -x; gcc --version; g++ --version
       - run: clang   -E -x c   -dM /dev/null # list predefined macros for C
       - run: clang++ -E -x c++ -dM /dev/null # list predefined macros for C++
       - run: gcc     -E -x c   -dM /dev/null # list predefined macros for C
@@ -235,8 +237,11 @@ jobs:
       - name: Check out test suite
         if: ${{ matrix.testsuite }}
         run: git clone --depth=1 https://github.com/upx/upx-testsuite ../deps/upx-testsuite
+      - run: set -x; clang --version; clang++ --version
       - run: clang   -E -x c   -dM /dev/null # list predefined macros for C
       - run: clang++ -E -x c++ -dM /dev/null # list predefined macros for C++
+      - run: set -x; ${{ matrix.gcc }} --version; ${{ matrix.gxx }} --version
+        if: ${{ matrix.gcc }}
       - run: ${{ matrix.gcc }} -E -x c   -dM /dev/null # list predefined macros for C
         if: ${{ matrix.gcc }}
       - run: ${{ matrix.gxx }} -E -x c++ -dM /dev/null # list predefined macros for C++
@@ -546,6 +551,7 @@ jobs:
           if test "X$ZIG_PIC" = "X-fPIE"; then true;
             echo "ZIG_FLAGS=$ZIG_FLAGS --start-no-unused-arguments -pie --end-no-unused-arguments" >> $GITHUB_ENV
           fi
+      - run: set -x; zig version; zig-cc --version; zig-cxx --version
       - run: zig-cc  -E -x c   -dM /dev/null # list predefined macros for C
       - run: zig-cxx -E -x c++ -dM /dev/null # list predefined macros for C++
       - name: ${{ format('Build Release with zig-cc -target {0} {1}', env.ZIG_TARGET, env.ZIG_PIC) }}

src/check/dt_check.cpp

@@ -491,7 +491,7 @@ struct CheckSignedness {
 };
 
 template <class A, class B>
-struct TestNoAliasingStruct {
+struct TestNoAliasingStruct { // check working -fno-strict-aliasing
     static noinline bool test(A *a, B *b) noexcept {
         *a = 0;
         *b = 0;
@@ -504,10 +504,10 @@ static forceinline bool testNoAliasing(A *a, B *b) noexcept {
     return TestNoAliasingStruct<A, B>::test(a, b);
 }
 template <class T>
-struct TestIntegerWrap {
+struct TestIntegerWrap { // check working -fno-strict-overflow
     static inline bool inc_gt(const T x) noexcept { return x + 1 > x; }
     static inline bool dec_lt(const T x) noexcept { return x - 1 < x; }
-    static inline bool neg_eq(const T x) noexcept { return T(0) - x == x; }
+    static inline bool neg_eq(const T x) noexcept { return T(T(0) - x) == x; }
 };
 
 //

src/help.cpp

@@ -618,6 +618,16 @@ void show_sysinfo(const char *options_var) {
 #endif
 
         // misc compilation options
+#if defined(__PIC__)
+        cf_print("__PIC__", "%lld", __PIC__ + 0, 3);
+#elif defined(__pic__)
+        cf_print("__pic__", "%lld", __pic__ + 0, 3);
+#endif
+#if defined(__PIE__)
+        cf_print("__PIE__", "%lld", __PIE__ + 0, 3);
+#elif defined(__pie__)
+        cf_print("__pie__", "%lld", __pie__ + 0, 3);
+#endif
 #if defined(UPX_CONFIG_DISABLE_WSTRICT)
         cf_print("UPX_CONFIG_DISABLE_WSTRICT", "%lld", UPX_CONFIG_DISABLE_WSTRICT + 0, 3);
 #endif

src/util/system_headers.h

@@ -27,6 +27,7 @@
 #pragma once
 
 #include "system_defs.h"
+#include "system_features.h"
 
 #if !(__cplusplus + 0 >= 201703L)
 #error "FATAL ERROR: C++17 is required"
@@ -40,7 +41,7 @@
 #error "missing __CYGWIN__"
 #endif
 #if defined(__clang__) || defined(__GNUC__)
-// these are pre-defined since gcc-4.6 (2011) and clang-3.2 (2012)
+// byte order - these are pre-defined since gcc-4.6 (2011) and clang-3.2 (2012)
 #if !defined(__ORDER_BIG_ENDIAN__) || (__ORDER_BIG_ENDIAN__ + 0 == 0)
 #error "missing __ORDER_BIG_ENDIAN__"
 #endif
@@ -60,6 +61,25 @@
 #error "unexpected __BYTE_ORDER__"
 #endif
 #endif
+// pic and pie
+#if defined(__PIC__) && defined(__pic__)
+static_assert((__PIC__) == (__pic__));
+#endif
+#if defined(__PIC__)
+static_assert(__PIC__ == 1 || __PIC__ == 2);
+#endif
+#if defined(__pic__)
+static_assert(__pic__ == 1 || __pic__ == 2);
+#endif
+#if defined(__PIE__) && defined(__pie__)
+static_assert((__PIE__) == (__pie__));
+#endif
+#if defined(__PIE__)
+static_assert(__PIE__ == 1 || __PIE__ == 2);
+#endif
+#if defined(__pie__)
+static_assert(__pie__ == 1 || __pie__ == 2);
+#endif
 
 // sanity checks
 #if defined(_ILP32) || defined(__ILP32) || defined(__ILP32__)