diff --git a/libm/libm.map.txt b/libm/libm.map.txt
index 66dfd19..c77e1d1 100644
--- a/libm/libm.map.txt
+++ b/libm/libm.map.txt
@@ -1,6 +1,6 @@
 LIBC {
   global:
-    __fe_dfl_env;
+    __fe_dfl_env; # var
     __signbit;
     __signbitf;
     __signbitl;
@@ -8,59 +8,59 @@
     acosf;
     acosh;
     acoshf;
-    acoshl;
-    acosl;
+    acoshl; # introduced=21
+    acosl; # introduced=21
     asin;
     asinf;
     asinh;
     asinhf;
-    asinhl;
-    asinl;
+    asinhl; # introduced=21
+    asinl; # introduced=21
     atan;
     atan2;
     atan2f;
-    atan2l;
+    atan2l; # introduced=21
     atanf;
     atanh;
     atanhf;
-    atanhl;
-    atanl;
-    cabs;
-    cabsf;
-    cabsl;
-    cacos;
-    cacosf;
-    cacosh;
-    cacoshf;
-    carg;
-    cargf;
-    cargl;
-    casin;
-    casinf;
-    casinh;
-    casinhf;
-    catan;
-    catanf;
-    catanh;
-    catanhf;
+    atanhl; # introduced=21
+    atanl; # introduced=21
+    cabs; # introduced=23
+    cabsf; # introduced=23
+    cabsl; # introduced-arm=21 introduced-arm64=23 introduced-mips=21 introduced-mips64=23 introduced-x86=21 introduced-x86_64=23
+    cacos; # introduced=23
+    cacosf; # introduced=23
+    cacosh; # introduced=23
+    cacoshf; # introduced=23
+    carg; # introduced=23
+    cargf; # introduced=23
+    cargl; # introduced=23
+    casin; # introduced=23
+    casinf; # introduced=23
+    casinh; # introduced=23
+    casinhf; # introduced=23
+    catan; # introduced=23
+    catanf; # introduced=23
+    catanh; # introduced=23
+    catanhf; # introduced=23
     cbrt;
     cbrtf;
-    cbrtl;
-    ccos;
-    ccosf;
-    ccosh;
-    ccoshf;
+    cbrtl; # introduced=21
+    ccos; # introduced=23
+    ccosf; # introduced=23
+    ccosh; # introduced=23
+    ccoshf; # introduced=23
     ceil;
     ceilf;
     ceill;
-    cexp;
-    cexpf;
-    cimag;
-    cimagf;
-    cimagl;
-    conj;
-    conjf;
-    conjl;
+    cexp; # introduced=23
+    cexpf; # introduced=23
+    cimag; # introduced=23
+    cimagf; # introduced=23
+    cimagl; # introduced=23
+    conj; # introduced=23
+    conjf; # introduced=23
+    conjl; # introduced=23
     copysign;
     copysignf;
     copysignl;
@@ -68,62 +68,62 @@
     cosf;
     cosh;
     coshf;
-    coshl;
-    cosl;
-    cproj;
-    cprojf;
-    cprojl;
-    creal;
-    crealf;
-    creall;
-    csin;
-    csinf;
-    csinh;
-    csinhf;
-    csqrt;
-    csqrtf;
-    csqrtl;
-    ctan;
-    ctanf;
-    ctanh;
-    ctanhf;
+    coshl; # introduced=21
+    cosl; # introduced=21
+    cproj; # introduced=23
+    cprojf; # introduced=23
+    cprojl; # introduced-arm=21 introduced-arm64=23 introduced-mips=21 introduced-mips64=23 introduced-x86=21 introduced-x86_64=23
+    creal; # introduced=23
+    crealf; # introduced=23
+    creall; # introduced=23
+    csin; # introduced=23
+    csinf; # introduced=23
+    csinh; # introduced=23
+    csinhf; # introduced=23
+    csqrt; # introduced=23
+    csqrtf; # introduced=23
+    csqrtl; # introduced-arm=21 introduced-arm64=23 introduced-mips=21 introduced-mips64=23 introduced-x86=21 introduced-x86_64=23
+    ctan; # introduced=23
+    ctanf; # introduced=23
+    ctanh; # introduced=23
+    ctanhf; # introduced=23
     drem;
     dremf;
     erf;
     erfc;
     erfcf;
-    erfcl;
+    erfcl; # introduced=21
     erff;
-    erfl;
+    erfl; # introduced=21
     exp;
     exp2;
     exp2f;
-    exp2l;
+    exp2l; # introduced=21
     expf;
-    expl;
+    expl; # introduced=21
     expm1;
     expm1f;
-    expm1l;
+    expm1l; # introduced=21
     fabs;
     fabsf;
     fabsl;
     fdim;
     fdimf;
     fdiml;
-    feclearexcept;
-    fedisableexcept;
-    feenableexcept;
-    fegetenv;
-    fegetexcept;
-    fegetexceptflag;
-    fegetround;
-    feholdexcept;
-    feraiseexcept;
-    fesetenv;
-    fesetexceptflag;
-    fesetround;
-    fetestexcept;
-    feupdateenv;
+    feclearexcept; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    fedisableexcept; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    feenableexcept; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    fegetenv; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    fegetexcept; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    fegetexceptflag; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    fegetround; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    feholdexcept; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    feraiseexcept; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    fesetenv; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    fesetexceptflag; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    fesetround; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    fetestexcept; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    feupdateenv; # introduced-arm=21 introduced-arm64=21 introduced-mips=21 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
     finite;
     finitef;
     floor;
@@ -131,7 +131,7 @@
     floorl;
     fma;
     fmaf;
-    fmal;
+    fmal; # introduced=21
     fmax;
     fmaxf;
     fmaxl;
@@ -140,17 +140,17 @@
     fminl;
     fmod;
     fmodf;
-    fmodl;
+    fmodl; # introduced=21
     frexp;
     frexpf;
-    frexpl;
+    frexpl; # introduced=21
     gamma;
     gamma_r;
     gammaf;
     gammaf_r;
     hypot;
     hypotf;
-    hypotl;
+    hypotl; # introduced=21
     ilogb;
     ilogbf;
     ilogbl;
@@ -166,77 +166,77 @@
     lgamma_r;
     lgammaf;
     lgammaf_r;
-    lgammal;
-    lgammal_r;
+    lgammal; # introduced=21
+    lgammal_r; # introduced=23
     llrint;
     llrintf;
-    llrintl;
+    llrintl; # introduced=21
     llround;
     llroundf;
     llroundl;
     log;
     log10;
     log10f;
-    log10l;
+    log10l; # introduced=21
     log1p;
     log1pf;
-    log1pl;
-    log2;
-    log2f;
-    log2l;
+    log1pl; # introduced=21
+    log2; # introduced-arm=18 introduced-arm64=21 introduced-mips=18 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
+    log2f; # introduced-arm=18 introduced-arm64=21 introduced-mips=18 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
+    log2l; # introduced-arm=18 introduced-arm64=21 introduced-mips=18 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
     logb;
     logbf;
-    logbl;
+    logbl; # introduced-arm=18 introduced-arm64=21 introduced-mips=18 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
     logf;
-    logl;
+    logl; # introduced=21
     lrint;
     lrintf;
-    lrintl;
+    lrintl; # introduced=21
     lround;
     lroundf;
     lroundl;
     modf;
     modff;
-    modfl;
-    nan;
-    nanf;
-    nanl;
+    modfl; # introduced=21
+    nan; # introduced-arm=13 introduced-arm64=21 introduced-mips=13 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    nanf; # introduced-arm=13 introduced-arm64=21 introduced-mips=13 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    nanl; # introduced-arm=13 introduced-arm64=21 introduced-mips=13 introduced-mips64=21 introduced-x86=13 introduced-x86_64=21
     nearbyint;
     nearbyintf;
-    nearbyintl;
+    nearbyintl; # introduced=21
     nextafter;
     nextafterf;
-    nextafterl;
-    nexttoward;
+    nextafterl; # introduced=21
+    nexttoward; # introduced-arm=18 introduced-arm64=21 introduced-mips=18 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
     nexttowardf;
-    nexttowardl;
+    nexttowardl; # introduced-arm=18 introduced-arm64=21 introduced-mips=18 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
     pow;
     powf;
-    powl;
+    powl; # introduced=21
     remainder;
     remainderf;
-    remainderl;
+    remainderl; # introduced=21
     remquo;
     remquof;
-    remquol;
+    remquol; # introduced=21
     rint;
     rintf;
-    rintl;
+    rintl; # introduced=21
     round;
     roundf;
     roundl;
     scalb;
     scalbf;
-    scalbln;
-    scalblnf;
-    scalblnl;
+    scalbln; # introduced-arm=9 introduced-arm64=21 introduced-mips=9 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
+    scalblnf; # introduced-arm=9 introduced-arm64=21 introduced-mips=9 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
+    scalblnl; # introduced-arm=9 introduced-arm64=21 introduced-mips=9 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
     scalbn;
     scalbnf;
     scalbnl;
-    signgam;
+    signgam; # var
     significand;
     significandf;
-    significandl;
+    significandl; # introduced=21
     sin;
     sincos;
     sincosf;
@@ -244,20 +244,20 @@
     sinf;
     sinh;
     sinhf;
-    sinhl;
-    sinl;
+    sinhl; # introduced=21
+    sinl; # introduced=21
     sqrt;
     sqrtf;
-    sqrtl;
+    sqrtl; # introduced=21
     tan;
     tanf;
     tanh;
     tanhf;
-    tanhl;
-    tanl;
+    tanhl; # introduced=21
+    tanl; # introduced=21
     tgamma;
-    tgammaf;
-    tgammal;
+    tgammaf; # introduced-arm=13 introduced-arm64=21 introduced-mips=13 introduced-mips64=21 introduced-x86=9 introduced-x86_64=21
+    tgammal; # introduced=21
     trunc;
     truncf;
     truncl;