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Add WOLFSSL_BARMETAL macro #9426

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Add WOLFSSL_BARMETAL macro #9426

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f870b69
Add WOLFSSL_BARMETAL macro
jackctj117 Nov 13, 2025
7593364
Address PR feedback: Make WOLFCRYPT_ONLY and NO_ASN_TIME optional
devin-ai-integration[bot] Nov 13, 2025
a5682cb
Added bare-metal build and documentation
jackctj117 Nov 14, 2025
3373672
bare-metal test fix
jackctj117 Nov 14, 2025
dfc4dd9
Improvements to bare-metal
dgarske Nov 14, 2025
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9 changes: 9 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -328,6 +328,15 @@ else()
list(APPEND WOLFSSL_DEFINITIONS "-DSINGLE_THREADED")
endif()

# Bare metal
add_option("WOLFSSL_BAREMETAL"
"Enable wolfSSL bare metal build (default: disabled)"
"no" "yes;no")

if(WOLFSSL_BAREMETAL)
list(APPEND WOLFSSL_DEFINITIONS "-DWOLFSSL_BAREMETAL")
endif()

# DTLS-SRTP
add_option("WOLFSSL_SRTP"
"Enables wolfSSL DTLS-SRTP (default: disabled)"
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11 changes: 11 additions & 0 deletions configure.ac
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Expand Up @@ -1990,6 +1990,17 @@ AS_IF([ test "x$ENABLED_SINGLETHREADED" = "xno" ],[

AS_IF([ test "x$ENABLED_SINGLETHREADED" = "xyes" ],[ AM_CFLAGS="$AM_CFLAGS -DSINGLE_THREADED" ])

# BARE METAL
AC_ARG_ENABLE([baremetal],
[AS_HELP_STRING([--enable-baremetal],[Enable wolfSSL bare metal build (default: disabled)])],
[ ENABLED_BAREMETAL=$enableval ],
[ ENABLED_BAREMETAL=no ])

if test "$ENABLED_BAREMETAL" = "yes"
then
AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_BAREMETAL"
fi

# Enable rwlock
AC_ARG_ENABLE([rwlock],
[AS_HELP_STRING([--enable-rwlock],[Enable use of rwlock (default: disabled)])],
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13 changes: 13 additions & 0 deletions wolfssl/wolfcrypt/settings.h
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Expand Up @@ -342,6 +342,19 @@
#endif
#endif

/* Bare metal configuration */
#ifdef WOLFSSL_BAREMETAL
#define SINGLE_THREADED
#define NO_DEV_RANDOM
#define NO_FILESYSTEM
#define NO_WRITEV
#define NO_STDIO_FILESYSTEM
#define WOLFSSL_NO_SOCK
#define NO_ASN_TIME
#define WOLFCRYPT_ONLY
#define WOLFSSL_NO_GETPID
#endif

#if !defined(WOLFSSL_CUSTOM_CONFIG) && \
((defined(BUILDING_WOLFSSL) && defined(WOLFSSL_USE_OPTIONS_H)) || \
(defined(BUILDING_WOLFSSL) && defined(WOLFSSL_OPTIONS_H) && \
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