Currently, non-IA builds are not reproducibile since build paths are 
being injected into the debug symbols. These are coming from the use of
.S assembler files during the glibc build. No STT_FILE section is added
during the assembly but when linking, ld decides to add one to aid 
debugging and ensure references between the different object files its
linking remain clear.

We can avoid this by injecting a file header into the assembler files
ahead of time, choosing a filename which does not contain build system
paths.

This is a bit of a workaround/hack but does significantly reduce the
build system references in target binaries for the non-IA architectures
which use .S files.

RP
2018/10/3

Upstream-Status: Pending

diff --git a/csu/abi-note.S b/csu/abi-note.S
index 5d0ca7803d..8ce41581b1 100644
--- a/csu/abi-note.S
+++ b/csu/abi-note.S
@@ -56,6 +56,8 @@ offset	length	contents
 #include <config.h>
 #include <abi-tag.h>		/* OS-specific ABI tag value */
 
+	.file "abi-note.S"
+
 /* The linker (GNU ld 2.8 and later) recognizes an allocated section whose
    name begins with `.note' and creates a PT_NOTE program header entry
    pointing at it. */
diff --git a/sysdeps/aarch64/crti.S b/sysdeps/aarch64/crti.S
index 2b213758b2..736f33e314 100644
--- a/sysdeps/aarch64/crti.S
+++ b/sysdeps/aarch64/crti.S
@@ -50,6 +50,8 @@
 # define PREINIT_FUNCTION_WEAK 1
 #endif
 
+    .file "crti.S"
+
 #if PREINIT_FUNCTION_WEAK
 	weak_extern (PREINIT_FUNCTION)
 #else
diff --git a/sysdeps/aarch64/crtn.S b/sysdeps/aarch64/crtn.S
index d72300af80..cb249bf3ca 100644
--- a/sysdeps/aarch64/crtn.S
+++ b/sysdeps/aarch64/crtn.S
@@ -37,6 +37,8 @@
 /* crtn.S puts function epilogues in the .init and .fini sections
    corresponding to the prologues in crti.S. */
 
+	.file "crtn.S"
+
 	.section .init,"ax",%progbits
 	ldp	x29, x30, [sp], 16
 	RET
diff --git a/sysdeps/aarch64/start.S b/sysdeps/aarch64/start.S
index bad000f555..5957c028cd 100644
--- a/sysdeps/aarch64/start.S
+++ b/sysdeps/aarch64/start.S
@@ -18,6 +18,8 @@
 
 #include <sysdep.h>
 
+	.file "start.S"
+
 /* This is the canonical entry point, usually the first thing in the text
    segment.
 
diff --git a/sysdeps/unix/sysv/linux/aarch64/__read_tp.S b/sysdeps/unix/sysv/linux/aarch64/__read_tp.S
index 92fc0191a5..715bfcb9e4 100644
--- a/sysdeps/unix/sysv/linux/aarch64/__read_tp.S
+++ b/sysdeps/unix/sysv/linux/aarch64/__read_tp.S
@@ -18,6 +18,8 @@
 
 #include <sysdep.h>
 
+	.file "__read_tp.S"
+
 	.hidden __read_tp
 ENTRY (__read_tp)
 	mrs	x0, tpidr_el0
diff --git a/sysdeps/aarch64/dl-tlsdesc.S b/sysdeps/aarch64/dl-tlsdesc.S
index 43a62ef307..42f85cdde9 100644
--- a/sysdeps/aarch64/dl-tlsdesc.S
+++ b/sysdeps/aarch64/dl-tlsdesc.S
@@ -22,6 +22,8 @@
 #include <tls.h>
 #include "tlsdesc.h"
 
+	.file "dl-tlsdesc.S"
+
 #define NSAVEDQREGPAIRS	16
 #define SAVE_Q_REGISTERS				\
 	stp	q0, q1,	[sp, #-32*NSAVEDQREGPAIRS]!;	\
diff --git a/sysdeps/aarch64/dl-trampoline.S b/sysdeps/aarch64/dl-trampoline.S
index a86d0722d4..92edab1d01 100644
--- a/sysdeps/aarch64/dl-trampoline.S
+++ b/sysdeps/aarch64/dl-trampoline.S
@@ -21,6 +21,8 @@
 
 #include "dl-link.h"
 
+	.file "dl-trampoline.S"
+
 #define ip0 x16
 #define ip0l PTR_REG (16)
 #define ip1 x17
diff --git a/sysdeps/arm/abi-note.S b/sysdeps/arm/abi-note.S
index 07bd4c4619..7213b16f27 100644
--- a/sysdeps/arm/abi-note.S
+++ b/sysdeps/arm/abi-note.S
@@ -1,3 +1,5 @@
+	.file "abi-note.S"
+
 /* Tag_ABI_align8_preserved: This code preserves 8-byte
    alignment in any callee.  */
 	.eabi_attribute 25, 1
diff --git a/sysdeps/arm/crti.S b/sysdeps/arm/crti.S
index a1424d0333..bca1dab256 100644
--- a/sysdeps/arm/crti.S
+++ b/sysdeps/arm/crti.S
@@ -57,6 +57,8 @@
 	.hidden PREINIT_FUNCTION
 #endif
 
+    .file "crti.S"
+
 #if PREINIT_FUNCTION_WEAK
 	.p2align 2
 	.type call_weak_fn, %function
diff --git a/sysdeps/arm/crtn.S b/sysdeps/arm/crtn.S
index 26027693ce..65a0502826 100644
--- a/sysdeps/arm/crtn.S
+++ b/sysdeps/arm/crtn.S
@@ -37,6 +37,8 @@
 #define NO_THUMB
 #include <sysdep.h>
 
+    .file "crtn.S"
+
 /* crtn.S puts function epilogues in the .init and .fini sections
    corresponding to the prologues in crti.S. */
 
diff --git a/sysdeps/arm/dl-tlsdesc.S b/sysdeps/arm/dl-tlsdesc.S
index 056e17d52d..a98c68dfb9 100644
--- a/sysdeps/arm/dl-tlsdesc.S
+++ b/sysdeps/arm/dl-tlsdesc.S
@@ -21,6 +21,8 @@
 #include <tls.h>
 #include "tlsdesc.h"
 
+	.file "dl-tlsdesc.S"
+
 	.text
 	@ emit debug information with cfi
 	@ use arm-specific pseudos for unwinding itself
diff --git a/sysdeps/arm/dl-trampoline.S b/sysdeps/arm/dl-trampoline.S
index c731b01286..4b37b25344 100644
--- a/sysdeps/arm/dl-trampoline.S
+++ b/sysdeps/arm/dl-trampoline.S
@@ -21,6 +21,8 @@
 #include <sysdep.h>
 #include <libc-symbols.h>
 
+	.file "dl-trampoline.S"
+
 	.text
 	.globl _dl_runtime_resolve
 	.type _dl_runtime_resolve, #function
diff --git a/sysdeps/arm/start.S b/sysdeps/arm/start.S
index adef090717..d22e4128e0 100644
--- a/sysdeps/arm/start.S
+++ b/sysdeps/arm/start.S
@@ -57,6 +57,8 @@
 					NULL
 */
 
+	.file "start.S"
+
 /* Tag_ABI_align8_preserved: This code preserves 8-byte
    alignment in any callee.  */
 	.eabi_attribute 25, 1
diff --git a/sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S b/sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S
index 871702317a..20a942dbac 100644
--- a/sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S
+++ b/sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S
@@ -39,6 +39,8 @@
    a normal function call) in a high page of memory; tail call to the
    helper.  */
 
+	.file "aeabi_read_tp.S"
+
 	.hidden __aeabi_read_tp
 ENTRY (__aeabi_read_tp)
 #ifdef ARCH_HAS_HARD_TP
diff --git a/sysdeps/mips/start.S b/sysdeps/mips/start.S
index a4c4ef0fae..d00fff31a8 100644
--- a/sysdeps/mips/start.S
+++ b/sysdeps/mips/start.S
@@ -38,6 +38,8 @@
 #include <sgidefs.h>
 #include <sys/asm.h>
 
+	.file "start.S"
+
 #ifndef ENTRY_POINT
 #error ENTRY_POINT needs to be defined for start.S on MIPS/ELF.
 #endif
diff --git a/sysdeps/unix/sysv/linux/powerpc/dl-brk.S b/sysdeps/unix/sysv/linux/powerpc/dl-brk.S
index eeb96544e3..da182b28f8 100644
--- a/sysdeps/unix/sysv/linux/powerpc/dl-brk.S
+++ b/sysdeps/unix/sysv/linux/powerpc/dl-brk.S
@@ -1 +1,3 @@
+	.file "dl-brk.S"
+
 #include <brk.S>
diff --git a/sysdeps/powerpc/powerpc32/start.S b/sysdeps/powerpc/powerpc32/start.S
index 5c10a22f8a..2b52627f27 100644
--- a/sysdeps/powerpc/powerpc32/start.S
+++ b/sysdeps/powerpc/powerpc32/start.S
@@ -35,6 +35,8 @@
 
 #include <sysdep.h>
 
+	.file "start.S"
+
 /* We do not want .eh_frame info for crt1.o since crt1.o is linked
    before crtbegin.o, the file defining __EH_FRAME_BEGIN__.  */
 #undef cfi_startproc
diff --git a/sysdeps/powerpc/powerpc64/start.S b/sysdeps/powerpc/powerpc64/start.S
index bd7189310c..2e22b8472d 100644
--- a/sysdeps/powerpc/powerpc64/start.S
+++ b/sysdeps/powerpc/powerpc64/start.S
@@ -35,6 +35,8 @@
 
 #include <sysdep.h>
 
+	.file "start.S"
+
 /* We do not want .eh_frame info for crt1.o since crt1.o is linked
    before crtbegin.o, the file defining __EH_FRAME_BEGIN__.  */
 #undef cfi_startproc
diff --git a/sysdeps/powerpc/powerpc32/dl-start.S b/sysdeps/powerpc/powerpc32/dl-start.S
index 244d87fb6d..14d3e2ce14 100644
--- a/sysdeps/powerpc/powerpc32/dl-start.S
+++ b/sysdeps/powerpc/powerpc32/dl-start.S
@@ -18,6 +18,8 @@
 
 #include <sysdep.h>
 
+	.file "dl-start.S"
+
 /* Initial entry point code for the dynamic linker.
    The C function `_dl_start' is the real entry point;
    its return value is the user program's entry point.	*/
diff --git a/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S b/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S
index d26ad1f8d3..a0de10bf81 100644
--- a/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S
+++ b/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S
@@ -27,6 +27,8 @@
    ARM unwind tables for register to register moves, the actual opcodes
    are not defined.  */
 
+      .file "libc-do-syscall.S"
+
 #if defined(__thumb__)
 	.thumb
 	.syntax unified