QNX: check and use elf.h from alternative location

In QNX, instead of #include <elf.h>, we have to use #include <sys/elf.h>
since that file is placed in a subdirectory.

Also removed the previous workaround.

Fixes: QTBUG-97833
Change-Id: Id932a5eeb618a42c8778459cdfd8bb5bf903523c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/plugin/qelfparser_p.cpp

@@ -40,7 +40,7 @@
 
 #include "qelfparser_p.h"
 
-#if defined (Q_OF_ELF) && __has_include(<elf.h>)
+#ifdef Q_OF_ELF
 
 #include "qlibrary_p.h"
 
@@ -48,7 +48,13 @@
 #include <qnumeric.h>
 #include <qsysinfo.h>
 
-#include <elf.h>
+#if __has_include(<elf.h>)
+#  include <elf.h>
+#elif __has_include(<sys/elf.h>)
+#  include <sys/elf.h>
+#else
+#  error "Need ELF header to parse plugins."
+#endif
 
 QT_BEGIN_NAMESPACE
 
@@ -408,7 +414,9 @@ Q_DECL_UNUSED Q_DECL_COLD_FUNCTION static QDebug &operator<<(QDebug &d, ElfHeade
     case EM_MIPS:       d << ", MIPS"; break;
     case EM_PPC:        d << ", PowerPC"; break;
     case EM_PPC64:      d << ", PowerPC 64-bit"; break;
+#ifdef EM_RISCV
     case EM_RISCV:      d << ", RISC-V"; break;
+#endif
     case EM_S390:       d << ", S/390"; break;
     case EM_SH:         d << ", SuperH"; break;
     case EM_SPARC:      d << ", SPARC"; break;
@@ -790,4 +798,4 @@ QLibraryScanResult QElfParser::parse(QByteArrayView data, QString *errMsg)
 
 QT_END_NAMESPACE
 
-#endif // defined(Q_OF_ELF) && defined(Q_CC_GNU)
+#endif // Q_OF_ELF

src/corelib/plugin/qelfparser_p.h

@@ -56,7 +56,7 @@
 
 QT_REQUIRE_CONFIG(library);
 
-#if defined(Q_OF_ELF) && __has_include(<elf.h>)
+#ifdef Q_OF_ELF
 
 QT_BEGIN_NAMESPACE
 
@@ -67,6 +67,6 @@ struct QElfParser
 
 QT_END_NAMESPACE
 
-#endif // defined(Q_OF_ELF) && defined(Q_CC_GNU)
+#endif // Q_OF_ELF
 
 #endif // QELFPARSER_P_H

src/corelib/plugin/qlibrary.cpp

@@ -203,7 +203,7 @@ static QLibraryScanResult qt_find_pattern(const char *s, qsizetype s_len, QStrin
       More importantly, the pattern string may exist in the debug information due
       to it being used in the plugin in the first place.
     */
-#if defined (Q_OF_ELF) && __has_include(<elf.h>)
+#if defined(Q_OF_ELF)
     return QElfParser::parse({s, s_len}, errMsg);
 #elif defined(Q_OF_MACH_O)
     return QMachOParser::parse(s, s_len, errMsg);

src/corelib/plugin/qmachparser_p.h

@@ -70,6 +70,6 @@ public:
 
 QT_END_NAMESPACE
 
-#endif // defined(Q_OF_ELF) && defined(Q_CC_GNU)
+#endif // defined(Q_OF_MACH_O)
 
 #endif // QMACHPARSER_P_H

tests/auto/corelib/plugin/qpluginloader/tst_qpluginloader.cpp

@@ -94,14 +94,12 @@
 # define PREFIX         "lib"
 #endif
 
-// Workaround for missing elf.h in QNX test environment
-// TODO: this can be removed after QTBUG-97833 has been solved
-#if defined(Q_OF_ELF) && defined(Q_OS_QNX) && !__has_include(<elf.h>)
-#undef Q_OF_ELF
+#if defined(Q_OF_ELF)
+#if __has_include(<elf.h>)
+# include <elf.h>
+#else
+# include <sys/elf.h>
 #endif
-
-#if defined (Q_OF_ELF)
-#  include <elf.h>
 #  include <memory>
 #  include <functional>
 
@@ -183,7 +181,7 @@ static std::unique_ptr<QTemporaryFile> patchElf(const QString &source, ElfPatche
         if (QTest::currentTestFailed()) return;         \
         std::move(r);                                   \
     })
-#endif
+#endif // Q_OF_ELF
 
 static QString sys_qualifiedLibraryName(const QString &fileName)
 {
@@ -395,7 +393,8 @@ void tst_QPluginLoader::deleteinstanceOnUnload()
     }
 }
 
-#if defined (Q_OF_ELF)
+#if defined(Q_OF_ELF)
+
 void tst_QPluginLoader::loadDebugObj()
 {
 #if !defined(QT_SHARED)