Silence some gcc-8-snapshot compiler warnings.

src/compress_lzma.cpp

@@ -43,7 +43,7 @@
 
 void lzma_compress_config_t::reset()
 {
-    memset(this, 0, sizeof(*this));
+    mem_clear(this, sizeof(*this));
 
     pos_bits.reset();
     lit_pos_bits.reset();

src/compress_zlib.cpp

@@ -33,7 +33,7 @@
 
 void zlib_compress_config_t::reset()
 {
-    memset(this, 0, sizeof(*this));
+    mem_clear(this, sizeof(*this));
 
     mem_level.reset();
     window_bits.reset();

src/main.cpp

@@ -46,7 +46,7 @@ int _crt0_startup_flags = _CRT0_FLAG_UNIX_SBRK;
 void options_t::reset()
 {
     options_t *o = this;
-    memset(o, 0, sizeof(*o));
+    mem_clear(o, sizeof(*o));
     o->crp.reset();
 
     o->cmd = CMD_NONE;

src/p_armpe.cpp

@@ -92,15 +92,6 @@ void PackArmPe::processImports2(unsigned myimport, unsigned iat_off) // pass 2
 {
     PeFile::processImports2(myimport, iat_off);
 
-__packed_struct(import_desc)
-    LE32  oft;      // orig first thunk
-    char  _[8];
-    LE32  dllname;
-    LE32  iat;      // import address table
-__packed_struct_end()
-
-    COMPILE_TIME_ASSERT(sizeof(import_desc) == 20);
-
     // adjust import data
     for (import_desc *im = (import_desc*) oimpdlls; im->dllname; im++)
     {

src/packer.cpp

@@ -47,7 +47,7 @@ Packer::Packer(InputFile *f) :
     if (fi != NULL)
         file_size = fi->st_size();
     uip = new UiPacker(this);
-    memset(&ph, 0, sizeof(ph));
+    mem_clear(&ph, sizeof(ph));
 }
 
 
@@ -665,7 +665,7 @@ unsigned Packer::getRandomId() const
 // this is called directly after the constructor from class PackMaster
 void Packer::initPackHeader()
 {
-    memset(&ph, 0, sizeof(ph));
+    mem_clear(&ph, sizeof(ph));
     ph.version = getVersion();
     ph.format = getFormat();
     ph.method = M_NONE;

src/pefile.cpp

@@ -560,13 +560,6 @@ void PeFile64::processRelocs() // pass1
 // import handling
 **************************************************************************/
 
-//__packed_struct(import_desc)
-//    LE32  oft;      // orig first thunk
-//    char  _[8];
-//    LE32  dllname;
-//    LE32  iat;      // import address table
-//__packed_struct_end()
-
 LE32& PeFile::IDSIZE(unsigned x) { return iddirs[x].size; }
 LE32& PeFile::IDADDR(unsigned x) { return iddirs[x].vaddr; }
 LE32& PeFile::ODSIZE(unsigned x) { return oddirs[x].size; }

src/pefile.h

@@ -179,10 +179,10 @@ protected:
     ddirs_t *oddirs;
 
     __packed_struct(import_desc)
-    LE32  oft;      // orig first thunk
+        LE32  oft;      // orig first thunk
-    char  _[8];
+        char  _[8];
-    LE32  dllname;
+        LE32  dllname;
-    LE32  iat;      // import address table
+        LE32  iat;      // import address table
     __packed_struct_end()
 
     LE32 &IDSIZE(unsigned x);

src/util.cpp

@@ -115,6 +115,12 @@ unsigned ptr_udiff(const void *p1, const void *p2) {
     return ACC_ICONV(unsigned, d);
 }
 
+void mem_clear(void *p, size_t n)
+{
+    mem_size_assert(1, n);
+    memset(p, 0, n);
+}
+
 /*************************************************************************
 // bele.h
 **************************************************************************/

src/util.h

@@ -50,6 +50,8 @@ bool mem_size_valid_bytes(upx_uint64_t bytes);
 int ptr_diff(const void *p1, const void *p2);
 unsigned ptr_udiff(const void *p1, const void *p2); // asserts p1 >= p2
 
+void mem_clear(void *p, size_t n);
+
 /*************************************************************************
 // misc. support functions
 **************************************************************************/