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libsc: detect and link libm explicitly for math-using examples #235

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Merged
cburstedde merged 3 commits into from
Feb 5, 2026
Merged

libsc: detect and link libm explicitly for math-using examples #235

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b6b7f74
libsc: detect and link libm explicitly for math-using examples
mathsen Jan 2, 2026
e9440b1
Undo previous change in configure.ac and make SC_CHECK_MATH more robust
mathsen Jan 5, 2026
63f41dd
Add author information file
mathsen Jan 11, 2026
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3 changes: 2 additions & 1 deletion config/sc_include.m4
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Original file line number Diff line number Diff line change
Expand Up @@ -175,7 +175,8 @@ AC_DEFUN([SC_CHECK_MATH],
[[
/* make this so complex that the compiler cannot predict the result */
double a = 3.14149;
for (; sqrt (a) < a; a *= 1.000023) { putc ('1', stdout); }
double (*volatile fp)(double) = sqrt;
for (; fp (a) < a; a *= 1.000023) { putc ('1', stdout); }
]], [m],
[AC_DEFINE([HAVE_MATH], [1], [Define to 1 if sqrt links successfully])],
[AC_MSG_ERROR([unable to link with sqrt, cos, sin, both as is and with -lm])])
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1 change: 1 addition & 0 deletions doc/author_anselmann.txt
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@@ -0,0 +1 @@
I place my contributions to libsc under the FreeBSD license. Mathias Anselmann