crypt: Remove libcrypt support

All the crypt related functions, cryptographic algorithms, and
make requirements are removed,  with only the exception of md5
implementation which is moved to locale folder since it is
required by localedef for integrity protection (libc's
locale-reading code does not check these, but localedef does
generate them).

Besides thec code itself, both internal documentation and the
manual is also adjusted.  This allows to remove both --enable-crypt
and --enable-nss-crypt configure options.

Checked with a build for all affected ABIs.

Co-authored-by: Zack Weinberg <zack@owlfolio.org>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>

2 files changed, 0 insertions, 44 deletions

diff --git a/elf/Makefile b/elf/Makefile
index 9176cbf1e3..b46dee1c16 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -1217,23 +1217,6 @@ $(objpfx)tst-_dl_addr_inside_object: $(objpfx)dl-addr-obj.os
 CFLAGS-tst-_dl_addr_inside_object.c += $(PIE-ccflag)
 endif
 
-# We can only test static libcrypt use if libcrypt has been built,
-# and either NSS crypto is not in use, or static NSS libraries are
-# available.
-ifeq ($(build-crypt),no)
-CFLAGS-tst-linkall-static.c += -DUSE_CRYPT=0
-else
-ifeq ($(nss-crypt),no)
-CFLAGS-tst-linkall-static.c += -DUSE_CRYPT=1
-else
-ifeq ($(static-nss-crypt),no)
-CFLAGS-tst-linkall-static.c += -DUSE_CRYPT=0
-else
-CFLAGS-tst-linkall-static.c += -DUSE_CRYPT=1
-endif
-endif
-endif
-
 include ../Rules
 
 ifeq (yes,$(build-shared))
@@ -1951,9 +1934,6 @@ endif
 ifeq ($(have-thread-library),yes)
 localplt-built-dso += $(filter-out %_nonshared.a, $(shared-thread-library))
 endif
-ifeq ($(build-crypt),yes)
-localplt-built-dso += $(addprefix $(common-objpfx), crypt/libcrypt.so)
-endif
 ifneq ($(pthread-in-libc),yes)
 localplt-built-dso += $(addprefix $(common-objpfx), rt/librt.so)
 endif
@@ -2438,24 +2418,6 @@ $(objpfx)tst-linkall-static: \
   $(common-objpfx)rt/librt.a \
   $(static-thread-library)
 
-ifeq ($(build-crypt),yes)
-# If we are using NSS crypto and we have the ability to link statically
-# then we include libcrypt.a, otherwise we leave out libcrypt.a and
-# link as much as we can into the tst-linkall-static test.  This assumes
-# that linking with libcrypt.a does everything required to include the
-# static NSS crypto library.
-ifeq (yesyes,$(nss-crypt)$(static-nss-crypt))
-$(objpfx)tst-linkall-static: \
-  $(common-objpfx)crypt/libcrypt.a
-endif
-# If we are not using NSS crypto then we always have the ability to link
-# with libcrypt.a.
-ifeq (no,$(nss-crypt))
-$(objpfx)tst-linkall-static: \
-  $(common-objpfx)crypt/libcrypt.a
-endif
-endif
-
 LDFLAGS-nextmod3.so = -Wl,--version-script=nextmod3.map
 
 # The application depends on the DSO, and the DSO loads the plugin.
diff --git a/elf/tst-linkall-static.c b/elf/tst-linkall-static.c
index d9943aa753..ccb6000d86 100644
--- a/elf/tst-linkall-static.c
+++ b/elf/tst-linkall-static.c
@@ -18,9 +18,6 @@
 
 #include <math.h>
 #include <pthread.h>
-#if USE_CRYPT
-# include <crypt.h>
-#endif
 #include <resolv.h>
 #include <dlfcn.h>
 #include <utmp.h>
@@ -34,9 +31,6 @@ void *references[] =
   {
     &pow,                       /* libm */
     &pthread_create,            /* libpthread */
-#if USE_CRYPT
-    &crypt,                     /* libcrypt */
-#endif
     &res_send,                  /* libresolv */
     &dlopen,                    /* libdl */
     &login,                     /* libutil */