BaseTools: Add the missing -pie link option in GCC tool chain

https://bugzilla.tianocore.org/show_bug.cgi?id=671
GCC tool chain uses -fpie in CC_FLAGS. So, add -pie in DLINK_FLAGS.
More discussion in
https://lists.01.org/pipermail/edk2-devel/2017-August/013508.html

3.13 Options for Linking
========================
'-pie'
     Produce a position independent executable on targets that support
     it.  For predictable results, you must also specify the same set
     of options used for compilation ('-fpie', '-fPIE', or model
     suboptions) when you specify this linker option.

3.18 Options for Code Generation Conventions
============================================
'-fpie'
'-fPIE'
     These options are similar to '-fpic' and '-fPIC', but generated
     position independent code can be only linked into executables.
     Usually these options are used when '-pie' GCC option is used
     during linking.
     '-fpie' and '-fPIE' both define the macros '__pie__' and
     '__PIE__'. The macros have the value 1 for '-fpie' and 2 for
     '-fPIE'.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
index 1fa3ca3ceae9936c6c1933e23bc1769a9ae1b7e2..998ed5c0c2fcf00f59dd09405512ad8940e5658c 100755 (executable)
--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -4375,7 +4375,7 @@ DEFINE GCC44_IA32_X64_DLINK_COMMON   = -nostdlib -Wl,-n,-q,--gc-sections -z comm
 DEFINE GCC44_IA32_X64_ASLDLINK_FLAGS = DEF(GCC44_IA32_X64_DLINK_COMMON) -Wl,--entry,ReferenceAcpiTable -u ReferenceAcpiTable\r
 DEFINE GCC44_IA32_X64_DLINK_FLAGS    = DEF(GCC44_IA32_X64_DLINK_COMMON) -Wl,--entry,$(IMAGE_ENTRY_POINT) -u $(IMAGE_ENTRY_POINT) -Wl,-Map,$(DEST_DIR_DEBUG)/$(BASE_NAME).map\r
 DEFINE GCC44_IA32_DLINK2_FLAGS       = -Wl,--defsym=PECOFF_HEADER_SIZE=0x220 DEF(GCC_DLINK2_FLAGS_COMMON)\r
-DEFINE GCC44_X64_DLINK_FLAGS         = DEF(GCC44_IA32_X64_DLINK_FLAGS) -Wl,-melf_x86_64,--oformat=elf64-x86-64\r
+DEFINE GCC44_X64_DLINK_FLAGS         = DEF(GCC44_IA32_X64_DLINK_FLAGS) -Wl,-melf_x86_64,--oformat=elf64-x86-64,-pie\r
 DEFINE GCC44_X64_DLINK2_FLAGS        = -Wl,--defsym=PECOFF_HEADER_SIZE=0x228 DEF(GCC_DLINK2_FLAGS_COMMON)\r
 DEFINE GCC44_ASM_FLAGS               = DEF(GCC_ASM_FLAGS)\r
 \r
@@ -4455,7 +4455,7 @@ DEFINE GCC49_IA32_X64_DLINK_COMMON   = -nostdlib -Wl,-n,-q,--gc-sections -z comm
 DEFINE GCC49_IA32_X64_ASLDLINK_FLAGS = DEF(GCC49_IA32_X64_DLINK_COMMON) -Wl,--entry,ReferenceAcpiTable -u ReferenceAcpiTable\r
 DEFINE GCC49_IA32_X64_DLINK_FLAGS    = DEF(GCC49_IA32_X64_DLINK_COMMON) -Wl,--entry,$(IMAGE_ENTRY_POINT) -u $(IMAGE_ENTRY_POINT) -Wl,-Map,$(DEST_DIR_DEBUG)/$(BASE_NAME).map\r
 DEFINE GCC49_IA32_DLINK2_FLAGS       = DEF(GCC48_IA32_DLINK2_FLAGS)\r
-DEFINE GCC49_X64_DLINK_FLAGS         = DEF(GCC49_IA32_X64_DLINK_FLAGS) -Wl,-melf_x86_64,--oformat=elf64-x86-64\r
+DEFINE GCC49_X64_DLINK_FLAGS         = DEF(GCC49_IA32_X64_DLINK_FLAGS) -Wl,-melf_x86_64,--oformat=elf64-x86-64,-pie\r
 DEFINE GCC49_X64_DLINK2_FLAGS        = DEF(GCC48_X64_DLINK2_FLAGS)\r
 DEFINE GCC49_ASM_FLAGS               = DEF(GCC48_ASM_FLAGS)\r
 DEFINE GCC49_ARM_ASM_FLAGS           = DEF(GCC48_ARM_ASM_FLAGS)\r