Changes in version 1.5.4.9000                      

    o   Fix installation on systems without GNU make by replacing GNU-specific pattern rule in src/Makevars with a portable static library build recipe; remove "GNU make" from SystemRequirements (#97)

    o   Internal refactor: cell writing extracted into per-type static C functions dispatched via write_cell() (no functional change; prepares for xl_cell_general support)

    o   Update to libxlsxwriter version 1.2.4; restructure vendored source to mirror upstream directory layout (src/libxlsxwriter/{src,include,third_party}) for simpler future updates

    o   Fix strcpy buffer overflow in internal C_set_tempdir (tempdir path >= 2048 bytes now errors informatively)

    o   write_xlsx() now errors informatively when data frame exceeds xlsx column limit (16384) or row limit (1048576)

    o   Fix signed/unsigned integer type mismatches in C code (lxw_row_t, lxw_col_t, R_xlen_t)

                 Changes in version 1.5.4 (2025-04-15)                  

    o   Fix LTO build for bundled libxlsxwriter

                 Changes in version 1.5.3 (2025-04-06)                  

    o   write_xlsx() now gives a warning if a column is of unsupported type

    o   Fix crash in write_xlsx() for corrupted data frames

                 Changes in version 1.5.2 (2025-03-17)                  

    o   Fix parallel make; cleanup after build

                 Changes in version 1.5.0 (2024-02-09)                  

    o   Update libxlsxwriter from b0c76b33

                 Changes in version 1.4.2 (2023-01-06)                  

    o   Bugfix for NA timestamps

                 Changes in version 1.4.1 (2022-10-18)                  

    o   Fix strict-prototypes warnings

                 Changes in version 1.4.0 (2021-04-20)                  

    o   Update libxlsxwriter to 1.0.3

                 Changes in version 1.3.1 (2020-08-26)                  

    o   Fix a unit test in R-devel for timezone attribute comparisons

                  Changes in version 1.3 (2020-05-05)                   

    o   write_xlsx gains option use_zip64 for 4GB+ file support

    o   libxslxwriter error messages are printed to REprintf instead of fprintf

    o   Handle overly long or duplicate sheet names

    o   The help assistant only appears once per session

                  Changes in version 1.2 (2019-11-27)                   

    o   Update bundled libxlswriter 0.8.8

    o   xl_formula and xl_hyperlink now correctly support NA

    o   Oil clippy a bit

                  Changes in version 1.1 (2018-12-02)                   

    o   Update bundled libxlswriter 0.8.4

    o   Do not write blank xlsx strings for NA and "" character values

    o   Coerce bit64 vectors to double with warning (xlsx does not have int64)

                  Changes in version 1.0 (2018-05-10)                   

    o   Save R 'Date' types as proper datetime strings

    o   Update vendored libxlswriter to 0.7.6

                  Changes in version 0.2 (2017-09-06)                   

    o   Add support for lists in write_xlsx() to create xlsx with multiple sheets

    o   Automatically coerce columns of type 'Date' and 'hms' to strings

                  Changes in version 0.1 (2017-08-30)                   

    o   Initial CRAN release with clippy