dlfcn: Move dlerror into libc

The symbol was moved using scripts/move-symbol-to-libc.py.

There is a minor functionality enhancement: dlerror now sets
errno if it was set as part of the exception.  (This is the result
of using %m in asprintf, to avoid the strerror PLT call.) The
previous errno value upon function return was unpredictable.
Documenting this as a feature is premature; we need to make sure
that the error codes are meaningful when they are set by the dynamic
loader.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

63 files changed, 66 insertions, 30 deletions

diff --git a/sysdeps/mach/hurd/i386/libc.abilist b/sysdeps/mach/hurd/i386/libc.abilist
index 49aa809366..4c62bf215f 100644
--- a/sysdeps/mach/hurd/i386/libc.abilist
+++ b/sysdeps/mach/hurd/i386/libc.abilist
@@ -741,6 +741,7 @@ GLIBC_2.2.6 dirfd F
 GLIBC_2.2.6 dirname F
 GLIBC_2.2.6 div F
 GLIBC_2.2.6 dl_iterate_phdr F
+GLIBC_2.2.6 dlerror F
 GLIBC_2.2.6 dngettext F
 GLIBC_2.2.6 dprintf F
 GLIBC_2.2.6 drand48 F
@@ -2207,6 +2208,7 @@ GLIBC_2.33 stat64 F
 GLIBC_2.34 __isnanf128 F
 GLIBC_2.34 __libc_start_main F
 GLIBC_2.34 _hurd_libc_proc_init F
+GLIBC_2.34 dlerror F
 GLIBC_2.34 execveat F
 GLIBC_2.34 timespec_getres F
 GLIBC_2.4 __confstr_chk F
diff --git a/sysdeps/mach/hurd/i386/libdl.abilist b/sysdeps/mach/hurd/i386/libdl.abilist
index 27d133bb7b..1073ce7845 100644
--- a/sysdeps/mach/hurd/i386/libdl.abilist
+++ b/sysdeps/mach/hurd/i386/libdl.abilist
@@ -1,6 +1,5 @@
 GLIBC_2.2.6 dladdr F
 GLIBC_2.2.6 dlclose F
-GLIBC_2.2.6 dlerror F
 GLIBC_2.2.6 dlopen F
 GLIBC_2.2.6 dlsym F
 GLIBC_2.2.6 dlvsym F
diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
index d22c7da7ef..cf1e160614 100644
--- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
@@ -718,6 +718,7 @@ GLIBC_2.17 dirfd F
 GLIBC_2.17 dirname F
 GLIBC_2.17 div F
 GLIBC_2.17 dl_iterate_phdr F
+GLIBC_2.17 dlerror F
 GLIBC_2.17 dngettext F
 GLIBC_2.17 dprintf F
 GLIBC_2.17 drand48 F
@@ -2342,6 +2343,7 @@ GLIBC_2.34 cnd_init F
 GLIBC_2.34 cnd_signal F
 GLIBC_2.34 cnd_timedwait F
 GLIBC_2.34 cnd_wait F
+GLIBC_2.34 dlerror F
 GLIBC_2.34 execveat F
 GLIBC_2.34 mtx_destroy F
 GLIBC_2.34 mtx_init F
diff --git a/sysdeps/unix/sysv/linux/aarch64/libdl.abilist b/sysdeps/unix/sysv/linux/aarch64/libdl.abilist
index 36340d5dd8..cb92fbf091 100644
--- a/sysdeps/unix/sysv/linux/aarch64/libdl.abilist
+++ b/sysdeps/unix/sysv/linux/aarch64/libdl.abilist
@@ -1,7 +1,6 @@
 GLIBC_2.17 dladdr F
 GLIBC_2.17 dladdr1 F
 GLIBC_2.17 dlclose F
-GLIBC_2.17 dlerror F
 GLIBC_2.17 dlinfo F
 GLIBC_2.17 dlmopen F
 GLIBC_2.17 dlopen F
diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist
index cefff3bf36..9b303bfeea 100644
--- a/sysdeps/unix/sysv/linux/alpha/libc.abilist
+++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist
@@ -409,6 +409,7 @@ GLIBC_2.0 difftime F
 GLIBC_2.0 dirfd F
 GLIBC_2.0 dirname F
 GLIBC_2.0 div F
+GLIBC_2.0 dlerror F
 GLIBC_2.0 dprintf F
 GLIBC_2.0 drand48 F
 GLIBC_2.0 drand48_r F
@@ -2434,6 +2435,7 @@ GLIBC_2.34 cnd_init F
 GLIBC_2.34 cnd_signal F
 GLIBC_2.34 cnd_timedwait F
 GLIBC_2.34 cnd_wait F
+GLIBC_2.34 dlerror F
 GLIBC_2.34 execveat F
 GLIBC_2.34 mtx_destroy F
 GLIBC_2.34 mtx_init F
diff --git a/sysdeps/unix/sysv/linux/alpha/libdl.abilist b/sysdeps/unix/sysv/linux/alpha/libdl.abilist
index 7826fde951..62dfb3059d 100644
--- a/sysdeps/unix/sysv/linux/alpha/libdl.abilist
+++ b/sysdeps/unix/sysv/linux/alpha/libdl.abilist
@@ -1,6 +1,5 @@
 GLIBC_2.0 dladdr F
 GLIBC_2.0 dlclose F
-GLIBC_2.0 dlerror F
 GLIBC_2.0 dlopen F
 GLIBC_2.0 dlsym F
 GLIBC_2.1 dlopen F
diff --git a/sysdeps/unix/sysv/linux/arc/libc.abilist b/sysdeps/unix/sysv/linux/arc/libc.abilist
index 91a90f8ca4..804e109621 100644
--- a/sysdeps/unix/sysv/linux/arc/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arc/libc.abilist
@@ -663,6 +663,7 @@ GLIBC_2.32 dirfd F
 GLIBC_2.32 dirname F
 GLIBC_2.32 div F
 GLIBC_2.32 dl_iterate_phdr F
+GLIBC_2.32 dlerror F
 GLIBC_2.32 dngettext F
 GLIBC_2.32 dprintf F
 GLIBC_2.32 drand48 F
@@ -2101,6 +2102,7 @@ GLIBC_2.34 cnd_init F
 GLIBC_2.34 cnd_signal F
 GLIBC_2.34 cnd_timedwait F
 GLIBC_2.34 cnd_wait F
+GLIBC_2.34 dlerror F
 GLIBC_2.34 execveat F
 GLIBC_2.34 mtx_destroy F
 GLIBC_2.34 mtx_init F
diff --git a/sysdeps/unix/sysv/linux/arc/libdl.abilist b/sysdeps/unix/sysv/linux/arc/libdl.abilist
index bf20b0c404..3f7f805044 100644
--- a/sysdeps/unix/sysv/linux/arc/libdl.abilist
+++ b/sysdeps/unix/sysv/linux/arc/libdl.abilist
@@ -1,7 +1,6 @@
 GLIBC_2.32 dladdr F
 GLIBC_2.32 dladdr1 F
 GLIBC_2.32 dlclose F
-GLIBC_2.32 dlerror F
 GLIBC_2.32 dlinfo F
 GLIBC_2.32 dlmopen F
 GLIBC_2.32 dlopen F
diff --git a/sysdeps/unix/sysv/linux/arm/be/libc.abilist b/sysdeps/unix/sysv/linux/arm/be/libc.abilist
index 120288d766..1c766b317d 100644
--- a/sysdeps/unix/sysv/linux/arm/be/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arm/be/libc.abilist
@@ -207,6 +207,7 @@ GLIBC_2.34 cnd_init F
 GLIBC_2.34 cnd_signal F
 GLIBC_2.34 cnd_timedwait F
 GLIBC_2.34 cnd_wait F
+GLIBC_2.34 dlerror F
 GLIBC_2.34 execveat F
 GLIBC_2.34 mtx_destroy F
 GLIBC_2.34 mtx_init F
@@ -1017,6 +1018,7 @@ GLIBC_2.4 dirfd F
 GLIBC_2.4 dirname F
 GLIBC_2.4 div F
 GLIBC_2.4 dl_iterate_phdr F
+GLIBC_2.4 dlerror F
 GLIBC_2.4 dngettext F
 GLIBC_2.4 dprintf F
 GLIBC_2.4 drand48 F
diff --git a/sysdeps/unix/sysv/linux/arm/be/libdl.abilist b/sysdeps/unix/sysv/linux/arm/be/libdl.abilist
index 40132b1374..1951f0a9af 100644
--- a/sysdeps/unix/sysv/linux/arm/be/libdl.abilist
+++ b/sysdeps/unix/sysv/linux/arm/be/libdl.abilist
@@ -1,7 +1,6 @@
 GLIBC_2.4 dladdr F
 GLIBC_2.4 dladdr1 F
 GLIBC_2.4 dlclose F
-GLIBC_2.4 dlerror F
 GLIBC_2.4 dlinfo F
 GLIBC_2.