build: stop treating schnorrsig, extrakeys modules as experimental

.cirrus.yml

@@ -67,12 +67,12 @@ task:
   << : *LINUX_CONTAINER
   matrix: &ENV_MATRIX
     - env: {WIDEMUL:  int64,  RECOVERY: yes}
-    - env: {WIDEMUL:  int64,                 ECDH: yes, EXPERIMENTAL: yes, SCHNORRSIG: yes}
+    - env: {WIDEMUL:  int64,                 ECDH: yes, SCHNORRSIG: yes}
     - env: {WIDEMUL: int128}
-    - env: {WIDEMUL: int128,  RECOVERY: yes,            EXPERIMENTAL: yes, SCHNORRSIG: yes}
-    - env: {WIDEMUL: int128,                 ECDH: yes, EXPERIMENTAL: yes, SCHNORRSIG: yes}
+    - env: {WIDEMUL: int128,  RECOVERY: yes,            SCHNORRSIG: yes}
+    - env: {WIDEMUL: int128,                 ECDH: yes, SCHNORRSIG: yes}
     - env: {WIDEMUL: int128,  ASM: x86_64}
-    - env: {                  RECOVERY: yes,            EXPERIMENTAL: yes, SCHNORRSIG: yes}
+    - env: {                  RECOVERY: yes,            SCHNORRSIG: yes}
     - env: {BUILD: distcheck, WITH_VALGRIND: no, CTIMETEST: no, BENCH: no}
     - env: {CPPFLAGS: -DDETERMINISTIC}
     - env: {CFLAGS: -O0, CTIMETEST: no}
@@ -95,7 +95,6 @@ task:
     HOST: i686-linux-gnu
     ECDH: yes
     RECOVERY: yes
-    EXPERIMENTAL: yes
     SCHNORRSIG: yes
   matrix:
     - env:
@@ -178,7 +177,6 @@ task:
     WITH_VALGRIND: no
     ECDH: yes
     RECOVERY: yes
-    EXPERIMENTAL: yes
     SCHNORRSIG: yes
     CTIMETEST: no
   << : *MERGE_BASE
@@ -198,12 +196,11 @@ task:
     WITH_VALGRIND: no
     ECDH: yes
     RECOVERY: yes
-    EXPERIMENTAL: yes
     SCHNORRSIG: yes
     CTIMETEST: no
   matrix:
     - env: {}
-    - env: {ASM: arm}
+    - env: {EXPERIMENTAL: yes, ASM: arm}
   << : *MERGE_BASE
   test_script:
     - ./ci/cirrus.sh
@@ -219,7 +216,6 @@ task:
     WITH_VALGRIND: no
     ECDH: yes
     RECOVERY: yes
-    EXPERIMENTAL: yes
     SCHNORRSIG: yes
     CTIMETEST: no
   << : *MERGE_BASE
@@ -237,7 +233,6 @@ task:
     WITH_VALGRIND: no
     ECDH: yes
     RECOVERY: yes
-    EXPERIMENTAL: yes
     SCHNORRSIG: yes
     CTIMETEST: no
   << : *MERGE_BASE
@@ -255,7 +250,6 @@ task:
     WITH_VALGRIND: no
     ECDH: yes
     RECOVERY: yes
-    EXPERIMENTAL: yes
     SCHNORRSIG: yes
     CTIMETEST: no
   << : *MERGE_BASE
@@ -269,7 +263,6 @@ task:
   env:
     ECDH: yes
     RECOVERY: yes
-    EXPERIMENTAL: yes
     SCHNORRSIG: yes
     CTIMETEST: no
   matrix:
@@ -317,7 +310,6 @@ task:
     CC: gcc
     MAKEFLAGS: -j4 CC=g++ CFLAGS=-fpermissive\ -g
     WERROR_CFLAGS:
-    EXPERIMENTAL: yes
     ECDH: yes
     RECOVERY: yes
     SCHNORRSIG: yes

README.md

@@ -17,9 +17,7 @@ Features:
 * Suitable for embedded systems.
 * Optional module for public key recovery.
 * Optional module for ECDH key exchange.
-* Optional module for Schnorr signatures according to [BIP-340](https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki) (experimental).
-
-Experimental features have not received enough scrutiny to satisfy the standard of quality of this library but are made available for testing and review by the community. The APIs of these features should not be considered stable.
+* Optional module for Schnorr signatures according to [BIP-340](https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki).
 
 Implementation details
 ----------------------
@@ -72,7 +70,6 @@ libsecp256k1 is built using autotools:
 Usage examples
 -----------
   Usage examples can be found in the [examples](examples) directory. To compile them you need to configure with `--enable-examples`.
-  For experimental modules, you will also need `--enable-experimental` as well as a flag for each individual module, e.g. `--enable-module-ecdh`.
   * [ECDSA example](examples/ecdsa.c)
   * [Schnorr Signatures example](examples/schnorr.c)
   * [Deriving a shared secret(ECDH) example](examples/ecdh.c)

configure.ac

@@ -152,11 +152,11 @@ AC_ARG_ENABLE(module_recovery,
     [SECP_SET_DEFAULT([enable_module_recovery], [no], [yes])])
 
 AC_ARG_ENABLE(module_extrakeys,
-    AS_HELP_STRING([--enable-module-extrakeys],[enable extrakeys module (experimental)]), [],
+    AS_HELP_STRING([--enable-module-extrakeys],[enable extrakeys module]), [],
     [SECP_SET_DEFAULT([enable_module_extrakeys], [no], [yes])])
 
 AC_ARG_ENABLE(module_schnorrsig,
-    AS_HELP_STRING([--enable-module-schnorrsig],[enable schnorrsig module (experimental)]), [],
+    AS_HELP_STRING([--enable-module-schnorrsig],[enable schnorrsig module]), [],
     [SECP_SET_DEFAULT([enable_module_schnorrsig], [no], [yes])])
 
 AC_ARG_ENABLE(external_default_callbacks,
@@ -367,16 +367,8 @@ if test x"$enable_experimental" = x"yes"; then
   AC_MSG_NOTICE([******])
   AC_MSG_NOTICE([WARNING: experimental build])
   AC_MSG_NOTICE([Experimental features do not have stable APIs or properties, and may not be safe for production use.])
-  AC_MSG_NOTICE([Building extrakeys module: $enable_module_extrakeys])
-  AC_MSG_NOTICE([Building schnorrsig module: $enable_module_schnorrsig])
   AC_MSG_NOTICE([******])
 else
-  if test x"$enable_module_extrakeys" = x"yes"; then
-    AC_MSG_ERROR([extrakeys module is experimental. Use --enable-experimental to allow.])
-  fi
-  if test x"$enable_module_schnorrsig" = x"yes"; then
-    AC_MSG_ERROR([schnorrsig module is experimental. Use --enable-experimental to allow.])
-  fi
   if test x"$set_asm" = x"arm"; then
     AC_MSG_ERROR([ARM assembly optimization is experimental. Use --enable-experimental to allow.])
   fi