Revert:

	2015-04-22  Gregor Richards  <gregor.richards@uwaterloo.ca>

	* config.gcc (LIBC_MUSL): New tm_defines macro.
	* config/linux.h (OPTION_MUSL): Define.
	(INCLUDE_DEFAULTS_MUSL_GPP, INCLUDE_DEFAULTS_MUSL_LOCAL,)
	(INCLUDE_DEFAULTS_MUSL_PREFIX, INCLUDE_DEFAULTS_MUSL_CROSS,)
	(INCLUDE_DEFAULTS_MUSL_TOOL, INCLUDE_DEFAULTS_MUSL_NATIVE): Define.

	* config/linux.opt (mmusl): New option.
	* configure.ac (gcc_cv_libc_provides_ssp): Add *-*-musl*.
	(gcc_cv_target_dl_iterate_phdr): Add *-linux-musl*.

	* configure: Regenerate.

From-SVN: r222330

gcc/ChangeLog

+2015-04-22  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	Revert:
+	2015-04-22  Gregor Richards  <gregor.richards@uwaterloo.ca>
+
+	* config.gcc (LIBC_MUSL): New tm_defines macro.
+	* config/linux.h (OPTION_MUSL): Define.
+	(INCLUDE_DEFAULTS_MUSL_GPP, INCLUDE_DEFAULTS_MUSL_LOCAL,)
+	(INCLUDE_DEFAULTS_MUSL_PREFIX, INCLUDE_DEFAULTS_MUSL_CROSS,)
+	(INCLUDE_DEFAULTS_MUSL_TOOL, INCLUDE_DEFAULTS_MUSL_NATIVE): Define.
+
+	* config/linux.opt (mmusl): New option.
+	* configure.ac (gcc_cv_libc_provides_ssp): Add *-*-musl*.
+	(gcc_cv_target_dl_iterate_phdr): Add *-linux-musl*.
+
+	* configure: Regenerate.
+
 2015-04-22  Gregor Richards  <gregor.richards@uwaterloo.ca>
 
 	* config.gcc (LIBC_MUSL): New tm_defines macro.

gcc/config.gcc

@@ -575,7 +575,7 @@ case ${target} in
 esac
 
 # Common C libraries.
-tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4"
+tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3"
 
 # 32-bit x86 processors supported by --with-arch=.  Each processor
 # MUST be separated by exactly one space.
@@ -725,9 +725,6 @@ case ${target} in
     *-*-*uclibc*)
       tm_defines="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC"
       ;;
-    *-*-*musl*)
-      tm_defines="$tm_defines DEFAULT_LIBC=LIBC_MUSL"
-      ;;
     *)
       tm_defines="$tm_defines DEFAULT_LIBC=LIBC_GLIBC"
       ;;

gcc/config/linux.h

@@ -32,12 +32,10 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #define OPTION_GLIBC  (DEFAULT_LIBC == LIBC_GLIBC)
 #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
 #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
-#define OPTION_MUSL   (DEFAULT_LIBC == LIBC_MUSL)
 #else
 #define OPTION_GLIBC  (linux_libc == LIBC_GLIBC)
 #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC)
 #define OPTION_BIONIC (linux_libc == LIBC_BIONIC)
-#define OPTION_MUSL   (linux_libc == LIBC_MUSL)
 #endif
 
 #define GNU_USER_TARGET_OS_CPP_BUILTINS()			\
@@ -52,25 +50,21 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     } while (0)
 
 /* Determine which dynamic linker to use depending on whether GLIBC or
-   uClibc or Bionic or musl is the default C library and whether
-   -muclibc or -mglibc or -mbionic or -mmusl has been passed to change
-   the default.  */
+   uClibc or Bionic is the default C library and whether
+   -muclibc or -mglibc or -mbionic has been passed to change the default.  */
 
-#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LIBC4, LD1, LD2, LD3, LD4)	\
-  "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:%{" LIBC4 ":" LD4 ";:" LD1 "}}}"
+#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LD1, LD2, LD3)	\
+  "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:" LD1 "}}"
 
 #if DEFAULT_LIBC == LIBC_GLIBC
-#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
-  CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", "mmusl", G, U, B, M)
+#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
+  CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", G, U, B)
 #elif DEFAULT_LIBC == LIBC_UCLIBC
-#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
-  CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", "mmusl", U, G, B, M)
+#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
+  CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", U, G, B)
 #elif DEFAULT_LIBC == LIBC_BIONIC
-#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
-  CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", "mmusl", B, G, U, M)
-#elif DEFAULT_LIBC == LIBC_MUSL
-#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
-  CHOOSE_DYNAMIC_LINKER1 ("mmusl", "mglibc", "muclibc", "mbionic", M, G, U, B)
+#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
+  CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", B, G, U)
 #else
 #error "Unsupported DEFAULT_LIBC"
 #endif /* DEFAULT_LIBC */
@@ -90,92 +84,21 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 
 #define GNU_USER_DYNAMIC_LINKER						\
   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER,	\
-			 BIONIC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER)
+			 BIONIC_DYNAMIC_LINKER)
 #define GNU_USER_DYNAMIC_LINKER32					\
   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \
-			 BIONIC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32)
+			 BIONIC_DYNAMIC_LINKER32)
 #define GNU_USER_DYNAMIC_LINKER64					\
   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \
-			 BIONIC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64)
+			 BIONIC_DYNAMIC_LINKER64)
 #define GNU_USER_DYNAMIC_LINKERX32					\
   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERX32, UCLIBC_DYNAMIC_LINKERX32, \
-			 BIONIC_DYNAMIC_LINKERX32, MUSL_DYNAMIC_LINKERX32)
+			 BIONIC_DYNAMIC_LINKERX32)
 
 /* Whether we have Bionic libc runtime */
 #undef TARGET_HAS_BIONIC
 #define TARGET_HAS_BIONIC (OPTION_BIONIC)
 
-/* musl avoids problematic includes by rearranging the include directories.
- * Unfortunately, this is mostly duplicated from cppdefault.c */
-#if DEFAULT_LIBC == LIBC_MUSL
-#define INCLUDE_DEFAULTS_MUSL_GPP			\
-    { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1,		\
-      GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },		\
-    { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1,		\
-      GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 },		\
-    { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1,	\
-      GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
-
-#ifdef LOCAL_INCLUDE_DIR
-#define INCLUDE_DEFAULTS_MUSL_LOCAL			\
-    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },		\
-    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
-#else
-#define INCLUDE_DEFAULTS_MUSL_LOCAL
-#endif
-
-#ifdef PREFIX_INCLUDE_DIR
-#define INCLUDE_DEFAULTS_MUSL_PREFIX			\
-    { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0},
-#else
-#define INCLUDE_DEFAULTS_MUSL_PREFIX
-#endif
-
-#ifdef CROSS_INCLUDE_DIR
-#define INCLUDE_DEFAULTS_MUSL_CROSS			\
-    { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0},
-#else
-#define INCLUDE_DEFAULTS_MUSL_CROSS
-#endif
-
-#ifdef TOOL_INCLUDE_DIR
-#define INCLUDE_DEFAULTS_MUSL_TOOL			\
-    { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0},
-#else
-#define INCLUDE_DEFAULTS_MUSL_TOOL
-#endif
-
-#ifdef NATIVE_SYSTEM_HEADER_DIR
-#define INCLUDE_DEFAULTS_MUSL_NATIVE			\
-    { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 },	\
-    { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 0 },
-#else
-#define INCLUDE_DEFAULTS_MUSL_NATIVE
-#endif
-
-#if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT)
-# undef INCLUDE_DEFAULTS_MUSL_LOCAL
-# define INCLUDE_DEFAULTS_MUSL_LOCAL
-# undef INCLUDE_DEFAULTS_MUSL_NATIVE
-# define INCLUDE_DEFAULTS_MUSL_NATIVE
-#else
-# undef INCLUDE_DEFAULTS_MUSL_CROSS
-# define INCLUDE_DEFAULTS_MUSL_CROSS
-#endif
-
-#undef INCLUDE_DEFAULTS
-#define INCLUDE_DEFAULTS				\
-  {							\
-    INCLUDE_DEFAULTS_MUSL_GPP				\
-    INCLUDE_DEFAULTS_MUSL_PREFIX			\
-    INCLUDE_DEFAULTS_MUSL_CROSS				\
-    INCLUDE_DEFAULTS_MUSL_TOOL				\
-    INCLUDE_DEFAULTS_MUSL_NATIVE			\
-    { GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 },		\
-    { 0, 0, 0, 0, 0, 0 }				\
-  }
-#endif
-
 #if (DEFAULT_LIBC == LIBC_UCLIBC) && defined (SINGLE_LIBC) /* uClinux */
 /* This is a *uclinux* target.  We don't define below macros to normal linux
    versions, because doing so would require *uclinux* targets to include

gcc/config/linux.opt

@@ -30,7 +30,3 @@ Use GNU C library
 muclibc
 Target Report RejectNegative Var(linux_libc,LIBC_UCLIBC) Negative(mbionic)
 Use uClibc C library
-
-mmusl
-Target Report RejectNegative Var(linux_libc,LIBC_MUSL) Negative(mglibc)
-Use musl C library

gcc/configure

@@ -27678,9 +27678,6 @@ if test "${gcc_cv_libc_provides_ssp+set}" = set; then :
 else
   gcc_cv_libc_provides_ssp=no
     case "$target" in
-       *-*-musl*)
-	 # All versions of musl provide stack protector
-	 gcc_cv_libc_provides_ssp=yes;;
        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
       # glibc 2.4 and later provides __stack_chk_fail and
       # either __stack_chk_guard, or TLS access to stack guard canary.
@@ -27713,7 +27710,6 @@ fi
 	 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
 	 # simply assert that glibc does provide this, which is true for all
 	 # realistically usable GNU/Hurd configurations.
-	 # All supported versions of musl provide it as well
 	 gcc_cv_libc_provides_ssp=yes;;
        *-*-darwin* | *-*-freebsd*)
 	 ac_fn_c_check_func "$LINENO" "__stack_chk_fail" "ac_cv_func___stack_chk_fail"
@@ -27810,9 +27806,6 @@ case "$target" in
       gcc_cv_target_dl_iterate_phdr=no
     fi
     ;;
-  *-linux-musl*)
-    gcc_cv_target_dl_iterate_phdr=yes
-    ;;
 esac
 
 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then

gcc/configure.ac

@@ -5199,9 +5199,6 @@ AC_CACHE_CHECK(__stack_chk_fail in target C library,
       gcc_cv_libc_provides_ssp,
       [gcc_cv_libc_provides_ssp=no
     case "$target" in
-       *-*-musl*)
-	 # All versions of musl provide stack protector
-	 gcc_cv_libc_provides_ssp=yes;;
        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
       # glibc 2.4 and later provides __stack_chk_fail and
       # either __stack_chk_guard, or TLS access to stack guard canary.
@@ -5228,7 +5225,6 @@ AC_CACHE_CHECK(__stack_chk_fail in target C library,
 	 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
 	 # simply assert that glibc does provide this, which is true for all
 	 # realistically usable GNU/Hurd configurations.
-	 # All supported versions of musl provide it as well
 	 gcc_cv_libc_provides_ssp=yes;;
        *-*-darwin* | *-*-freebsd*)
 	 AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
@@ -5302,9 +5298,6 @@ case "$target" in
       gcc_cv_target_dl_iterate_phdr=no
     fi
     ;;
-  *-linux-musl*)
-    gcc_cv_target_dl_iterate_phdr=yes
-    ;;
 esac
 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then